Ilha Grande wildlife
CHAPTER 03 · 84 SPECIES

The wildlife

Not a list of everything out there — a list of what you will actually see, and where to look.

HOW TO READ THIS LIST
YOU'LL SEE IT FREQUENT IF LUCKY VERY RARE
FROM THE POUSADA JUST NEARBY — the first you can see standing at the pousada; the second, in the village, at the pier or on the trail next door.

The ones marked ◉ Photo taken here are from the island: by Hans Bustos, a local guide, and by us. The rest are species reference shots. Nobody can promise you a wild animal: this is what shows up often, with season and place. Don't feed them — not the monkeys, not the opossum, not the wood-rail.

House gecko
YOU'LL SEE IT FROM THE POUSADA

House gecko

Hemidactylus mabouia
The wall of your room, next to the hallway light.
At night, as soon as the lights go on.

The best roommate you'll have here: it eats the mosquitoes that were coming for you.

◉ Photo taken here · Pousada Costa Verde
Fruit bat
YOU'LL SEE IT FROM THE POUSADA

Fruit bat

Artibeus lituratus
Crossing the village sky at dusk, especially near fruit trees.
The first twenty minutes after sundown.

Ilha Grande has 37 bat species and in 2025 was named an international conservation area for them. Almost all eat fruit and replant the forest.

Grey-cowled wood-rail
YOU'LL SEE IT FROM THE POUSADA

Grey-cowled wood-rail

Aramides cajaneus
Walking through village gardens and stream banks, unhurried.
Dawn and dusk, when it duets with its mate.

She owns this village: red legs, cinnamon breast, and that "três-potes, pot-pot-pot" call you'll hear every day without knowing who it was. Nearly all her cousins hide deep in the forest; this one chose to live among us.

Great kiskadee
YOU'LL SEE IT FROM THE POUSADA

Great kiskadee

Pitangus sulphuratus
Any wire, post or branch in the village.
All day — and it's the first thing to wake you.

It shouts its own name: "bem-te-vi". Yellow chest, black mask. The most Brazilian bird there is.

Black vulture
YOU'LL SEE IT FROM THE POUSADA

Black vulture

Coragyps atratus
Circling over the village and perched on rooftops and the pier.

It soars for hours without a wingbeat, riding warm air. It's the beach's cleaning service.

◉ Photo taken here · Pousada Costa Verde
Neotropic cormorant
YOU'LL SEE IT FROM THE POUSADA

Neotropic cormorant

Nannopterum brasilianum
On the rocks by the pier, wings spread out in the sun.

It spreads its wings because its feathers aren't waterproof: it soaks up water to weigh more and dive better, then has to dry off.

Rufous-collared sparrow
YOU'LL SEE IT FROM THE POUSADA

Rufous-collared sparrow

Zonotrichia capensis
Hopping along garden floors and footpaths.

A little striped grey crest and a rufous collar. It sings differently by region — it has an accent.

Palm tanager
YOU'LL SEE IT FROM THE POUSADA

Palm tanager

Thraupis palmarum
In the palms and any tree with ripe fruit.

Always in pairs, and they usually share the branch with their bluish cousin, the sayaca tanager.

Ruddy ground dove
YOU'LL SEE IT FROM THE POUSADA

Ruddy ground dove

Columbina talpacoti
Walking the ground, pecking between the tables.

It breeds nearly all year — up to six broods. That's why there's always one on the ground.

Sergeant major
YOU'LL SEE IT JUST NEARBY

Sergeant major

Abudefduf saxatilis
Any rock while snorkelling: Lagoa Azul, Botinas, the end of the beach.

The most abundant fish in the bay and the cheekiest: it swims up to peer into your mask.

Sardine shoal
YOU'LL SEE IT JUST NEARBY

Sardine shoal

Sardinella brasiliensis
From the Abraão pier, looking straight down into the water.

That dark patch moving as one animal is thousands of them. Everything else follows them.

Sea urchin
YOU'LL SEE IT JUST NEARBY

Sea urchin

Echinometra lucunter
Every submerged rock on the island, including at the edge of the beach.

The creature that sends the most tourists to the clinic. Never steady yourself on a rock with a bare hand.

⚠ Water shoes where it's rocky. If a spine goes in, go to the clinic.
Magnificent frigatebird
YOU'LL SEE IT JUST NEARBY

Magnificent frigatebird

Fregata magnificens
Very high over the bay and the pier, with that M-shaped silhouette.

Everyone here calls it "albatroz" and there are even guesthouses named after it, but it's a frigatebird: two and a half metres of wing, unable to land on water without drowning, and it robs fish from other birds in mid-air. Full story below.

Blue-and-white swallow
YOU'LL SEE IT JUST NEARBY

Blue-and-white swallow

Pygochelidon cyanoleuca
Flying low over the bay water and along the wires.
At dusk, when the insects come out.

It eats on the wing, never stopping. That ballet over the water before dinner is its working hour.

Black-eared opossum
FREQUENT FROM THE POUSADA

Black-eared opossum

Didelphis aurita
At night, along the rooftops and rubbish bins of the village.
After midnight, when the village goes quiet.

Not a rat and not a skunk: it's a marsupial, a kangaroo relative, and carries its young in a pouch. When scared, it plays dead.

◉ Photo taken here · Pousada Costa Verde
⚠ Close the rubbish bag and leave no food out. An opossum that gets used to people ends badly.
Brown howler monkey
FREQUENT FROM THE POUSADA

Brown howler monkey

Alouatta guariba clamitans
Treetops on the trails and at the edge of the village. You hear it long before you see it.
At dawn and before rain — that's when it roars.

That roar that sounds like something huge comes from a six-kilo monkey, and carries over a kilometre.

Tegu lizard
FREQUENT FROM THE POUSADA

Tegu lizard

Salvator merianae
Trail edges and back yards, sunbathing at midday.
Sunny days. In winter it barely comes out.

It can top a metre and a half and walks like a small dinosaur, but it's shy: stare at it and it leaves.

Blue morpho
FREQUENT FROM THE POUSADA

Blue morpho

Morpho helenor
Crossing the garden and shaded paths, with that flight that looks like it's falling.
Spring and early summer, on sunny days.

That blue isn't pigment: the wing scales are built like tiny mirrors that split the light. That's why it flashes on and off as it turns — and why, closed, it's brown and vanishes.

Marmoset
FREQUENT FROM THE POUSADA

Marmoset

Callithrix jacchus / penicillata
At the pousada's front door: they arrive along the power lines out front and drop into the jackfruit tree.
Roughly once a week, no fixed day — but if they come on Monday, they come on Tuesday too.

Squirrel-sized, with tufted ears and a very long tail that can't grip anything — it's only for balance. Not native: two species brought here from other regions of Brazil, and that story — babies riding piggyback — is below.

◉ Photo taken here · Pousada Costa Verde
⚠ Don't feed them, however close they come. They become dependent, get into houses and fight between troops.
Black-crowned night heron
FREQUENT FROM THE POUSADA

Black-crowned night heron

Nycticorax nycticorax
Hunched and motionless on the shore or a pier post. It looks like a grey penguin with red eyes.
It wakes at dusk: fishes by night, sleeps by day.

In Portuguese it's the <em>socó-dorminhoco</em>, the sleepyhead heron, because it spends the day asleep on its feet with its bill tucked to its chest. The red eyes are real, not a camera trick.

Picazuro pigeon
FREQUENT FROM THE POUSADA

Picazuro pigeon

Patagioenas picazuro
Tall trees and rooftops in the village; it nests in back yards.

The big wine-grey pigeon with a scaled nape that glints in the sun. It only reached Ilha Grande in 2013 — a newcomer that has settled in for good.

Swallow-tailed hummingbird
FREQUENT FROM THE POUSADA

Swallow-tailed hummingbird

Eupetomena macroura
Any garden flower, especially the bougainvillea.
First thing in the morning.

It beats its wings about 50 times a second and its heart tops a thousand beats a minute. Blue and green, with scissor tail.

Black jacobin
FREQUENT FROM THE POUSADA

Black jacobin

Florisuga fusca
The same flowers as the swallow-tail, but it stays longer and bosses the others around.

All black with a white tail, and big for a hummingbird — the one that looks like it's the wrong size. It sings so high that much of its song is above what the human ear can hear.

Plain parakeet
FREQUENT FROM THE POUSADA

Plain parakeet

Brotogeris tirica
In a noisy flock over the village palms.
At dusk, when they all fly back to roost together.

Found only in the Atlantic Forest. You'll hear them before you see them: straight line, full volume.

Guiana dolphin
FREQUENT JUST NEARBY

Guiana dolphin

Sotalia guianensis
On the boat trips, and sometimes from the pier first thing in the morning.
All year, best at dawn with a flat sea.

The bay dolphin par excellence. Researchers identify them one by one by the dorsal fin, like a fingerprint.

Blacksmith tree frog
FREQUENT JUST NEARBY

Blacksmith tree frog

Boana faber
Near any puddle or stream in the village — and sometimes in the shower.
Rainy summer nights are an absolute racket.

Named for its call, which sounds like someone hammering metal. The male builds a little mud pool for the eggs.

Golden silk orb-weaver
FREQUENT JUST NEARBY

Golden silk orb-weaver

Trichonephila clavipes
In its web, strung between two trees at face height on the trail.

The silk is literally golden and glints in the sun. It's stronger than steel of the same thickness; webs over a metre across can stop a small bird. The big spider is the female — the male is tiny and lives in a corner of her web.

◉ Photo taken here · Hans Bustos
Brazilian tanager
FREQUENT JUST NEARBY

Brazilian tanager

Ramphocelus bresilius
Garden shrubs and forest edges. Impossible to miss.

The male is an impossible, almost electric red with black wings. It exists only in the Atlantic Forest — no other forest on Earth.

Brown booby
FREQUENT JUST NEARBY

Brown booby

Sula leucogaster
Over the bay and perched on the rocks of the outer islands.

Spotting a fish, it dives from twenty metres and hits the water like an arrow. Worth waiting to see it.

Great egret
FREQUENT JUST NEARBY

Great egret

Ardea alba
On the shore and in the mangrove, motionless in shallow water.
At low tide, early or at sundown.

It can hold still for ten whole minutes, then strike in a tenth of a second.

Southern lapwing
FREQUENT JUST NEARBY

Southern lapwing

Vanellus chilensis
Open ground and grass: the village football pitch is its home.

The neighbourhood alarm: it shouts before anyone else and dive-bombs anyone near its nest. It hides a spur in its wing.

Rufous hornero
FREQUENT JUST NEARBY

Rufous hornero

Furnarius rufus
Walking the garden floor — and its nest on any post.

It builds that oven-shaped mud nest with two chambers and a curved corridor so nothing can get in. The pair does it together, over months.

Smooth-billed ani
FREQUENT JUST NEARBY

Smooth-billed ani

Crotophaga ani
In groups, on shrubs and fences in open areas.

All black, with an odd high curved bill. Several females lay in a single nest and raise the chicks together.

Kelp gull
FREQUENT JUST NEARBY

Kelp gull

Larus dominicanus
On the pier and the rocks, waiting for someone to clean fish.

It takes four years to earn the adult black-and-white suit; the young are brown and look like another species.

Green sea turtle
FREQUENT

Green sea turtle

Chelonia mydas
Snorkelling in Lagoa Azul and along the rocky shores on the boat trips.
All year. The juveniles live here — they're not just passing through.

The island isn't a nesting site: these are teenagers that stay for years grazing algae off the rocks.

⚠ Don't touch or chase it — it needs to surface calmly to breathe.
Starfish
FREQUENT

Starfish

Oreaster reticulatus
Sandy and seagrass bottoms at Lagoa Azul and the Botinas.

It digests by pushing its stomach out of its body onto its food, then pulling it back in.

⚠ Lifting it out for a photo kills it. Look at it underwater.
French angelfish
FREQUENT

French angelfish

Pomacanthus paru
Rocky shorelines, almost always in pairs.

They pair for life and patrol the same patch of rock together. Spot one and look for the other.

Parrotfish
FREQUENT

Parrotfish

Sparisoma frondosum
Algae-covered rocks at any snorkelling stop.

It bites the rock to eat the algae and spits the rest out as sand. A good share of the island's white sand has been through one.

Pufferfish
FREQUENT

Pufferfish

Sphoeroides spengleri
Shallow sandy water, hanging still near the bottom.

It only puffs up when genuinely frightened, and it costs it dearly — don't chase it to see the trick.

Damselfish
FREQUENT

Damselfish

Stegastes fuscus
Shallow rocks, always in the same square metre.

It farms its own algae garden and chases off anything that comes near — including you.

Humpback whale
FREQUENT

Humpback whale

Megaptera novaeangliae
Offshore. On a still day you can sometimes see the blow from land.
There's a season every year: July and August are the peak, the window runs May to November. Coming in those months? Ask at reception how it's going.

They come to mate and calve in warm water after feeding all summer in Antarctica, passing the island on the way. In season, Instagram fills up with videos shot right here — it's one of the few things you can spot from shore on a still day.

Black capuchin
FREQUENT

Black capuchin

Sapajus nigritus
Forest along the trails, in groups, rattling branches.

It uses stones as tools to crack hard fruit, learning by watching its elders — every troop has its own tricks. One of the island's two native monkeys, along with the howler.

Giant centipede
IF LUCKY FROM THE POUSADA

Giant centipede

Scolopendra viridicornis
Under leaves, plant pots and stones. At night it comes indoors looking for cool, damp spots.
At night, and more after rain.

Orange and black, extremely fast, up to 25 cm. The sting hurts a lot but isn't dangerous to a healthy adult. It guards its eggs by curling around them until they hatch — rare behaviour for an invertebrate.

◉ Photo taken here · Hans Bustos
⚠ Shake out your shoes before putting them on, and never pick it up. If stung: cold water, and go to the clinic if you're allergic.
Squid
IF LUCKY JUST NEARBY

Squid

Doryteuthis pleii
At night, under the lights of the Abraão pier.
After dark — the light draws small fish first, then them.

It changes colour in under a second. A sudden flash of red means it's annoyed.

Jellyfish
IF LUCKY JUST NEARBY

Jellyfish

Chrysaora lactea
Drifting near the shore, especially when the sea is choppy.
Summer, December to March.

No brain, no heart, no blood — and it's been doing fine like that for 500 million years.

⚠ If stung, rinse with seawater. Fresh water makes the sting worse.
Portuguese man o' war
IF LUCKY JUST NEARBY

Portuguese man o' war

Physalia physalis
Washed up on the sand or floating: the purple one with a sail on top.
Summer, especially after days of onshore wind.

Not a jellyfish, not even one animal: a colony of four kinds of individuals that can't live apart.

⚠ It stings hard and stays active stranded on the sand. Don't touch it, not even with a foot.
Magellanic penguin
IF LUCKY JUST NEARBY

Magellanic penguin

Spheniscus magellanicus
On the sand, almost always alone and exhausted. It can turn up on any beach.
Winter: June to September, peaking in July and August.

The cold current carries them up from the south. One of them, Dindim, made this island famous — the story is below.

◉ Photo taken here · Hans Bustos
⚠ Don't touch it or put it back in the sea — it's resting. Tell reception.
Glasswing butterfly
IF LUCKY JUST NEARBY

Glasswing butterfly

Methona themisto
Damp shade inside the forest, resting on a leaf.

Its wings are transparent — you can see the leaf through them. It's not that the scales are missing: they're there, built with a nanostructure that barely reflects light, so the butterfly vanishes in mid-flight.

◉ Photo taken here · Hans Bustos
Freshwater crab
IF LUCKY JUST NEARBY

Freshwater crab

Trichodactylus fluviatilis
Under stones in the streams and waterfalls along the trails.

It spends its whole life in fresh water, far from the sea, and it's a sign the stream is clean: where the water gets dirty, it disappears.

◉ Photo taken here · Hans Bustos
Neotropical otter
IF LUCKY JUST NEARBY

Neotropical otter

Lontra longicaudis
Right along the village seafront: it turns up now and then, without warning. Also in the rivers over towards Dois Rios.
Dawn and dusk, when the water is still.

It swims in fresh and salt water alike. Since it's almost impossible to see, biologists study it by what it leaves behind: it always uses the same river rock as a latrine, and that's where you count how many there are and what they ate.

Ringed kingfisher
IF LUCKY JUST NEARBY

Ringed kingfisher

Megaceryle torquata
Perched on a moored boat or a branch over the mangrove water.
Early morning, when the water is still.

The largest kingfisher in the Americas. When it dives it goes all the way in and comes out with the fish in its bill.

Octopus
IF LUCKY

Octopus

Octopus vulgaris
Rock crevices while snorkelling. You have to look — it rarely shows itself.

Look for the little pile of empty shells at a crevice mouth: that's its rubbish, and it's home.

Moray eel
IF LUCKY

Moray eel

Gymnothorax funebris
Tucked into a hole in the rock with its head out.

It opens and closes its mouth constantly — that's not a threat, it's how it breathes.

⚠ Never put your hand in a hole. It bites by reflex, not malice.
Stingray
IF LUCKY

Stingray

Hypanus americanus
Buried in the sand of beaches and shallows — only the eyes show.
Most active in warm water, December to March.

It never attacks: the barb is defence, used only if you step on its back.

⚠ Shuffle your feet as you wade in instead of stamping. They move off on their own.
Seahorse
IF LUCKY

Seahorse

Hippocampus reidi
Calm seagrass water, over towards Araçatiba and Saco do Céu.

It's the male that gets pregnant and gives birth. It grips with its tail so the current doesn't carry it off.

⚠ Threatened species: look from a distance, don't touch or use flash.
Atlantic spotted dolphin
IF LUCKY

Atlantic spotted dolphin

Stenella frontalis
More open water, on the longer trips like the Round-the-Island.

Born plain, it gains spots with age — you can read its years off its skin.

Agouti
IF LUCKY

Agouti

Dasyprocta leporina
Forest edges along the trails, in daylight. It bolts the moment it hears you.

It buries seeds for later and forgets half of them. Half this forest was planted by a distracted agouti.

Snail-eating snake
IF LUCKY

Snail-eating snake

Dipsas neuwiedi
Coiled on low branches and shrubs, also in vegetable patches and gardens.
At night. By day it sleeps coiled up — hence the name.

The island's great misunderstanding: it's called jararaca-dormideira because it wears the same markings as the lancehead, but it has <strong>no venom and no fangs</strong> and eats snails and slugs. Most snakes killed out of fear are this one.

⚠ Harmless as it is, don't touch it: nobody identifies a snake correctly at a glance. Leave it be and walk on.
Water snake
IF LUCKY

Water snake

Helicops carinicaudus
Rivers and waterfall pools, swimming at the surface.

It's harmless and eats fish, but since everyone shouts "lancehead!", it has the worst reputation on the island.

Coati
IF LUCKY

Coati

Nasua nasua
The long trails, especially the T-14 to Dois Rios. They travel in groups, by day.

Curious to the point of cheek: open a backpack in front of one and it will go through it. They travel in bands with tails held up like antennas, so they don't lose each other in the ferns.

⚠ Don't feed it or let it near your backpack — it scratches.
Ilha Grande torrent frog
IF LUCKY

Ilha Grande torrent frog

Hylodes fredi
Wet rocks beside the mountain streams, on the trails.

It exists nowhere else on Earth — only on this island. Since the rushing water drowns out its call, it signals with its feet instead.

Nine-banded armadillo
IF LUCKY

Nine-banded armadillo

Dasypus novemcinctus
The forest floor at night. Usually it's the turned-over leaf litter that gives it away, not the animal.

It always gives birth to identical quadruplets of the same sex — the only mammal that does.

Yellow rat snake
IF LUCKY

Yellow rat snake

Spilotes pullatus
Up in trees and shrubs, by day. Black and yellow, long and slim.

One of the most frequently recorded snakes on the island, and one of the most theatrical: cornered, it inflates its neck, rattles its tail against the leaves and plays dangerous. <strong>It hasn't a drop of venom.</strong> It tops two metres and climbs like few others.

◉ Photo taken here · Hans Bustos
Vine snake
IF LUCKY

Vine snake

Chironius bicarinatus
Among the branches of low vegetation along the trails, by day.

Green, thin and very long: it passes for a vine until it moves. Three different species live on the island, all harmless and all frog-eaters.

Tarantula
IF LUCKY

Tarantula

Theraphosidae
At the mouth of its burrow, on the trail edge. It comes out to hunt at night.

Huge and hairy, but its venom is no danger to us: its defence is a cloud of stinging hairs it kicks off its own abdomen with its back legs. They itch on skin and eyes — and only if you bother it.

◉ Photo taken here · Hans Bustos
⚠ Don't touch it or put your face close for a photo. At a distance it's harmless.
Spider-hunting wasp
IF LUCKY

Spider-hunting wasp

Pepsis sp.
On the trail floor, dragging a spider bigger than itself.

Metallic blue with orange antennae. It finds a big spider, paralyses it with a surgically precise sting — alive but immobile — drags it to a burrow, lays a single egg on it and seals it in. The larva eats the spider from the inside, saving the vital organs for last. It wants nothing to do with you.

◉ Photo taken here · Hans Bustos
Blue manakin
IF LUCKY

Blue manakin

Chiroxiphia caudata
The understorey of any trail through closed forest.
Mornings, and most active in spring and summer.

The males perform a choreographed group dance, taking turns on the same branch, to win a single female. Blue body, red cap.

Surucua trogon
IF LUCKY

Surucua trogon

Trogon surrucura
Motionless on a mid-level branch. Recorded on the Pico do Papagaio trail.

It sits so still that most people walk right under it. Yellow belly, grey back, white-edged tail.

Spot-billed toucanet
IF LUCKY

Spot-billed toucanet

Selenidera maculirostris
Inside the forest, in fruiting trees.

This is Ilha Grande's real toucan: smaller than the postcard one, with a spotted bill. The big toucan doesn't live here.

Bare-throated bellbird
IF LUCKY

Bare-throated bellbird

Procnias nudicollis
High canopy, in the best-preserved parts of the park.

That metallic clang like a hammer on an anvil, carrying hundreds of metres through the forest, is a white bird the size of a pigeon. It is the voice of the Atlantic Forest.

◉ Photo taken here · Hans Bustos
Solitary tinamou
IF LUCKY

Solitary tinamou

Tinamus solitarius
The floor of closed forest, on the long trails. You hear it, you don't see it.
Dawn and dusk.

Its long, melancholy whistle is one of the most beautiful sounds in the Brazilian forest, and a sign this forest is still healthy.

Nurse shark
VERY RARE

Nurse shark

Ginglymostoma cirratum
Scuba diving, asleep under a big rock.

The most placid shark there is: it sleeps the day away piled up with others and eats shellfish off the bottom.

Subantarctic fur seal
VERY RARE

Subantarctic fur seal

Arctocephalus tropicalis
Resting on remote beaches. The last one turned up at Parnaioca.
Winter, when the cold current comes in: June to August.

It lives thousands of kilometres south. The ones that reach us are youngsters that went too far.

⚠ It's resting, not stranded. Don't touch it or push it into the water — tell reception.
Orca
VERY RARE

Orca

Orcinus orca
Crossing the bay offshore. It passes through, it doesn't stay.

There is tourist and biologist video of them, but there's no season — it's pure luck.

Tiger shark
VERY RARE

Tiger shark

Galeocerdo cuvier
Deep water in the bay, far from the shore and the beaches.

In 2026 biologists counted about a hundred here for the first time. They were always there — and there has never been an attack on a swimmer on this island.

Capybara
VERY RARE

Capybara

Hydrochoerus hydrochaeris
River mouths and remote beaches.

The world's largest rodent, and it swims in the sea: INEA rescued one at Praia dos Meros, here on the island.

Paca
VERY RARE

Paca

Cuniculus paca
Dense forest near water, at night only.

It weighs as much as a medium dog, swims well and dives into the river to escape. Seeing one takes silence and a torch.

Boa constrictor
VERY RARE

Boa constrictor

Boa constrictor
Deep in the forest, still and camouflaged. This is the one guides describe as "a four-metre snake".

The largest snake on the island, and <strong>it has no venom</strong>: it kills by squeezing. Slow, calm and a rodent-eater — the best pest control the forest has. Seeing one is luck, not trouble.

Jararaca lancehead
VERY RARE

Jararaca lancehead

Bothrops jararaca
Leaf litter in the forest, on quieter trails. It's camouflaged — you almost never see it.

Its venom gave us the first modern blood-pressure drug, taken today by millions of people.

◉ Photo taken here · Hans Bustos
⚠ Closed shoes, and never a hand between rocks or logs. If you see one, stand still and go around. If bitten: call 192, no tourniquet, no cutting.
Coral snake
VERY RARE

Coral snake

Micrurus corallinus
Under leaf litter and soil. It spends nearly its whole life buried.

Its venom is stronger than the lancehead's, but its mouth is tiny and it hides so well that bites are extremely rare.

◉ Photo taken here · Hans Bustos
⚠ Any snake with coloured rings: don't touch it, don't move it. Not even with a stick.
Broad-snouted caiman
VERY RARE

Broad-snouted caiman

Caiman latirostris
The flooded stretch of trail T-12, between Pouso and the lighthouse. There are warning signs.

Guides say they descend from ones released at Dois Rios in the prison era. No document proves it, but the official sign is real — and it is the island's only crocodilian.

⚠ Don't wade into still water in that area, especially at dusk.
Puma
VERY RARE

Puma

Puma concolor
Deep in the park, over towards Dois Rios. Nobody sees it — camera traps do.

Locals swore for decades it was there, with no proof. In November 2022 a university camera filmed it for the first time: it was true, and it had never left.

Red-browed amazon
VERY RARE

Red-browed amazon

Amazona rhodocorytha
The canopy of well-preserved forest, over towards Dois Rios.
At dawn, when they cross overhead in pairs.

It's endangered and lives almost only along this strip of coast. Note: Pico do Papagaio isn't named after it, but after the shape of the rock.

King vulture
VERY RARE

King vulture

Sarcoramphus papa
Very high, over the wild side of the island: Parnaioca, Praia do Sul.

Its bare head is a hand-painted riot of colour. It was photographed on the island for the first time in 2025 — its arrival means the forest is doing better than before.

Pingüino de Magallanes en la Baía da Ilha Grande
◉ A real penguin, swimming right here in the bay. Photo by Hans Bustos.
THE ISLAND STORY

Dindim, the penguin who came back

In 2011, João Pereira de Souza, a retired fisherman from Praia de Provetá, here on Ilha Grande, found a Magellanic penguin on the sand, oil-soaked and barely moving. He cleaned it, fed it fish and named it Dindim. The penguin stayed almost a year before heading back to sea — and then came looking for him again, season after season, for years. It knew his voice and followed him around the yard.

What the world got wrong: newspapers said Dindim swam 8,000 km from Patagonia every year out of loyalty. The biologist who documented the case said they never claimed that, and that it is unlikely. What is verified is simpler and better: the rescue, and a wild penguin that for years chose to come back to the same beach.
Every winter, lost penguins turn up on the beaches around here. If you see one: don't touch it, don't put it back in the water, tell reception.
WHAT HAPPENS AT OUR DOOR

The marmosets, and the spots that moved

A few years ago a pair started coming along the power lines out front. The female had two patches on her back and we thought it was mange, that she was sick. We nearly called INEA. The patches stayed there week after week, and grew. One day we looked through the camera zoom: they were moving. They were the babies, clinging to her back. Later a guest photographed the best part of all — how the young pass from one parent's back to the other without ever touching the ground, because the father carries them as much as the mother does.

But they don't belong here. The island story goes that they were brought in when yellow fever killed the howler monkeys and people believed none were left — and that instead of bringing howlers, which are plentiful in this part of Brazil, they brought marmosets from other regions. The epidemic is real: between 2016 and 2018 yellow fever killed thousands of monkeys across the Atlantic Forest and reached Ilha Grande. The howlers survived — researchers later found living troops. The marmosets stayed too, and today there are two exotic species on the island.

And there is the problem, because howlers eat leaves and marmosets eat everything — eggs and chicks included. Where researchers put cameras on nests, marmosets took up to 80 or 90 % of the broods, and where they live the forest sings less. Ours are gentle and beautiful, and none of it is their fault. That's why you shouldn't feed them: it's the one thing we can do to keep their numbers to what the forest can carry.

Sagui
Fregata magnificens
THE ISLAND'S BEST-DEFENDED MYTH

The albatross question

Ask anyone in the village about that huge bird gliding over the pier and they'll say albatroz. There are guesthouses named after it. And the guides are half right: albatrosses do reach Rio de Janeiro — four hundred were once counted together at Cabo Frio — but they are open-ocean birds that in winter follow fishing boats where cold water rises. Our bay is warm and enclosed: they don't come in. In the island's two bird surveys, with 253 species listed, there is not a single albatross.

What you're looking at is a frigatebird, and it owes you nothing: two and a half metres of wing, unable to land on water without drowning, and it makes a living robbing fish from other birds in mid-air. The nickname stays; the story is better told right.

The only things to watch out for

None of this will ruin your trip: in practice, what hurts people here most is sea urchins and sunburn.

🌊 Sea urchins

The island's number-one accident. They cover every rock. Wear water shoes where it's rocky and never steady yourself with a bare hand.

🪼 Jellyfish and man o' war

Mostly in summer (Dec–Mar). The Portuguese man o' war is the purple one with a sail: don't touch it even on the sand, the tentacles stay active. If stung, rinse with seawater — never fresh water.

🐍 Snakes on the trail

The island has 27 snake species and <strong>only two are dangerous</strong>: the lancehead and the coral snake, both shy and very rarely met. Almost everything you'll actually see — yellow rat snake, vine snake, snail-eater, boa — has no venom at all. Closed shoes, watch your step, never a hand between logs or rocks. If you meet one, stand still and walk around it: none of them strike unless stepped on.

🐒 Don't feed them

A monkey or opossum that learns to beg ends up inside houses and, sooner or later, badly off. Keep food packed and rubbish bags closed — it's the best thing you can do for them.

🦈 Sharks: the truth

In 2026, around a hundred tiger sharks were documented in the bay for the first time. They live in deep water, far from shore, and in the island's whole history there has never been a single attack on a swimmer. A biologists' finding, not a reason to stay out of the water.

🐟 Rays in the sand

They bury themselves in sandy bottoms and only sting if stepped on. The old trick: shuffle your feet instead of stamping, and they move off on their own.

Spotted one? Tell us and we'll add it to the list
Photo credits (84)

15 of these photos were taken right here on Ilha Grande. They're by Hans Bustos, a local guide — the same Hans we recommend for the trails — and the rest are ours. Shared for this guide; each author keeps their rights.

Hans Bustos — Trichonephila clavipes · Procnias nudicollis · Methona themisto · Spilotes pullatus · Theraphosidae · Trichodactylus fluviatilis · Micrurus corallinus · Bothrops jararaca · Scolopendra viridicornis · Spheniscus magellanicus · Pepsis sp.
Pousada Costa Verde — Didelphis aurita · Hemidactylus mabouia · Callithrix jacchus / penicillata · Coragyps atratus

The rest are species reference photos from Wikimedia Commons under free licences, not taken on Ilha Grande.

Chrysaora lactea — Rodrigo Canalli, CC BY 4.0
Pygochelidon cyanoleuca — Cláudio Dias Timm from Rio Grande do Sul, CC BY-SA 2.0
Crotophaga ani — Charles J. Sharp, CC BY-SA 4.0
Selenidera maculirostris — Jairmoreirafotografia, CC BY-SA 4.0
Hypanus americanus — Pauline Walsh Jacobson, CC BY 4.0
Sula leucogaster — André Ganzarolli Martins, CC BY 4.0
Sphoeroides spengleri — Andrew David, NOAA/NMFS/SEFSC Panama City; Lance Horn, UNCW/NURC - Phantom II ROV operator., Public domain
Megaptera novaeangliae — Whit Welles Wwelles14, CC BY 3.0
Florisuga fusca — Dario Sanches from São Paulo, Brazil, CC BY-SA 2.0
Eupetomena macroura — Dario Sanches from São Paulo, Brazil, CC BY-SA 2.0
Pitangus sulphuratus — Rhododendrites, CC BY-SA 4.0
Nannopterum brasilianum — Dario Sanches from SÃO PAULO, BRASIL, CC BY-SA 2.0
Morpho helenor — Nosferattus, CC0
Sotalia guianensis — Instituto Boto Cinza, CC BY-SA 2.5
Sparisoma frondosum — Williams, J. T.; Carpenter, K. E.; Van Tassell, J. L.; Hoetjes, P.; Toller, W.; Etnoyer, P.; Smith, M., CC BY 2.5
Alouatta guariba — Peter Schoen, CC BY-SA 2.0
Hydrochoerus hydrochaeris — Wilfredor, CC0
Physalia physalis — Brett Ortler, CC BY 4.0
Hippocampus reidi — Liné1, CC BY-SA 3.0
Chironius bicarinatus — Miguelrangeljr, CC BY-SA 4.0
Helicops carinicaudus — Miranda J, Lopes Costa JC, Duarte da Rocha CF (2012), CC BY 3.0
Dasyprocta leporina — Alastair Rae from London, United Kingdom, CC BY-SA 2.0
Stegastes fuscus — Fernando Herranz Martín, GPL
Dipsas neuwiedi — Mateus S. Figueiredo, CC BY-SA 4.0
Oreaster reticulatus — James St. John, CC BY 2.0
Pomacanthus paru — LASZLO ILYES (laszlo-photo) from Cleveland, Ohio, USA, CC BY 2.0
Fregata magnificens — E. Kirdler, Public domain
Larus dominicanus — Godot13, CC BY-SA 4.0
Ardea alba — Chuck Homler (FocusOnWildlife.Me), CC BY-SA 4.0
Stenella frontalis — NOAA Southeast Fisheries Science Center, Public domain
Hylodes — Raquel Rocha Santos, CC BY-SA 2.5
Caiman latirostris — Miguelrangeljr, CC BY 3.0
Boa constrictor — I would appreciate being notified if you use my work outside Wikimedia. Do not copy this image illegally by ignoring the terms of the license below, as it is not in the public domain. If you would like special permission to use, license, or purchase the image please contact me to negotiate terms. More of my work can be found in my personal gallery., CC BY-SA 4.0
Furnarius rufus — Bernard DUPONT, CC BY-SA 2.0
Arctocephalus tropicalis — Nicolas Servera (otarie_san@yahoo.fr), CC BY-SA 3.0
Lontra longicaudis — © 2006 Carla Antonini, CC BY-SA 2.5 ar
Doryteuthis pleii — Betty Wills, CC BY-SA 4.0
Sapajus nigritus — Diego Persano, CC BY-SA 2.0
Tinamus solitarius — Mauro Regalado Soares, CC BY-SA 4.0
Sardinella brasiliensis — Marcelo Bandeira, CC BY-SA 4.0
Megaceryle torquata — Dario Sanches, CC BY-SA 2.0
Artibeus lituratus — Norman Salazar Arguedas, CC BY-SA 4.0
Gymnothorax funebris — Blueag9, CC BY-SA 3.0
Puma concolor — National Park Service, Public domain
Orcinus orca — Robert Pittman, Public domain
Echinometra lucunter — Hans Hillewaert, CC BY-SA 4.0
Cuniculus paca — Hans Hillewaert, CC BY-SA 3.0
Amazona rhodocorytha — Duncan Rawlinson, CC BY 2.0
Boana faber — Leandro Avelar, CC BY-SA 4.0
Brotogeris tirica — Dario Sanches from SÃO PAULO, BRASIL, CC BY-SA 2.0
Octopus vulgaris — Diego Delso, CC BY-SA 4.0
Patagioenas picazuro — Dariosanches, CC BY-SA 2.0
Nasua nasua — Luna04 at French Wikipedia, CC BY-SA 3.0
Vanellus chilensis — Kingfisher-Sapphire, CC BY-SA 4.0
Columbina talpacoti — dariosanches, CC BY-SA 2.0
Thraupis palmarum — Charles J. Sharp, CC BY-SA 4.0
Aramides cajaneus — Alejandro Bayer Tamayo from Armenia, Colombia, CC BY-SA 2.0
Abudefduf saxatilis — JeffreyGammon, CC BY-SA 4.0
Nycticorax nycticorax — Calibas, CC BY-SA 3.0
Trogon surrucura — Cláudio Dias Timm from Rio Grande do Sul, CC BY-SA 2.0
Chiroxiphia caudata — Dario Sanches from São Paulo, Brazil, CC BY-SA 2.0
Chelonia mydas — Wikimedia Commons, Copyrighted free use
Dasypus novemcinctus — Hans Stieglitz, CC BY-SA 3.0
Salvator merianae — Leonardo Palermo Gentile, CC BY-SA 4.0
Zonotrichia capensis — Charles J. Sharp, CC BY-SA 4.0
Ramphocelus bresilius — Dario Sanches from São Paulo, Brazil, CC BY-SA 2.0
Ginglymostoma cirratum — Wikimedia Commons, Public domain
Galeocerdo cuvier — Albert kok, CC BY-SA 3.0
Sarcoramphus papa — Olaf Oliviero Riemer, CC BY-SA 3.0