Field identification

Identifywhat you saw.

Begin with one clue—size, shape, color, habitat, or voice—and narrow the possibilities until you reach a documented profile.

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402species profiles

64documented families

3interactive tools

Turn an observation into an answer.

A strong identification starts with structure and context. Notice size, silhouette, bill, movement, and setting first; color changes with the light and is often a secondary clue.

Then compare lookalikes, hear their recordings, and check occurrence, habitat, and season. The atlas keeps those paths connected so a single clue never becomes a dead end.

Three ways to begin

Use the clue you remember.

By appearance

Filter by size, habitat, and occurrence with the guided finder.

By name

Search English, Spanish, scientific, and local names in the directory.

By family or setting

Compare related birds or species that share a landscape.

Identification keys

Compare without guessing.

Curated guides to Puerto Rico groups and questions that are commonly confused.

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Pattern-based identification

Black-and-yellow birds

Identify six black-and-yellow birds in Puerto Rico by yellow-patch placement, size, bill, habitat, sex, and age.

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Visual identification

Black birds

Compare Puerto Rico's most-confused black birds using size, bill, tail, color patches, behavior, and habitat.

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Size-first identification

Small birds

Identify Puerto Rico's small birds by relative size, bill, tail, behavior, color, and habitat, from todies and hummingbirds to warblers and grassquits.

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Identification answer

Are there crows in Puerto Rico?

A clear answer about Puerto Rico's crows: current population, historical species, and black birds commonly mistaken for them.

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Identification by silhouette

Large birds of Puerto Rico

Identify Puerto Rico pelicans, frigatebirds, herons, raptors, and large visitors by silhouette, flight, habitat, and status.

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Identification by silhouette

Long-tailed birds

Identify Puerto Rico long-tailed birds by shape, habitat, and status: Pin-tailed Whydah, Puerto Rican Lizard-Cuckoo, grackle, tropicbirds, and rarities.

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Identification by sound

Birds of the night

Distinguish Puerto Rican Owl, Nightjar, nighthawks, and night-herons by rhythm, silhouette, flight, habitat, and credited recordings.

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Everyday identification

Backyard and urban birds

Identify birds around yards, balconies, plazas, and streets, and create safer urban spaces.

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Green is not enough

Parrots and parakeets

Separate Puerto Rican Parrot from introduced parakeets using voice, silhouette, pattern, and context.

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Identification in flight

Raptors

Compare hawks, falcons, kestrels, and Osprey by silhouette, flight, habitat, and season.

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Shorelines and wetlands

Herons

Compare herons, egrets, and night-herons by size, legs, bill, plumage, posture, and feeding.

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Forest, coast, and plaza

Pigeons and doves

Distinguish pigeons and doves by size, tail, neck, wings, flight, voice, and habitat.

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Migration at water level

Shorebirds and plovers

Identify shorebirds by size, bill, legs, behavior, habitat, and season.

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Perches and voices

Flycatchers and kingbirds

Compare kingbirds, Puerto Rican Flycatcher, and elaenia by voice, bill, tail, perch, and hunting.

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Residents and travelers

Warblers

Identify warblers by face, wings, tail, habitat, behavior, and season, including two endemics.

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Fieldcraft

Diagnostic photography for bird identification

Which photos to take to identify a bird in a brief encounter: diagnostic angles, settings, and tropical light in Puerto Rico.

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Fieldcraft

How to photograph skulking birds in dense vegetation

A field method for photographing skulking birds: find the gap, focus on the eye, anticipate movement and respect ethical limits.

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Fieldcraft

Bird tracking: tracks, feathers, and signs

A practical guide to identifying birds by tracks, feathers, droppings, and feeding signs, featuring common Puerto Rico species.

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Fieldcraft guide

How to observe molt and plumage for bird identification

Read feather generations, molt limits and wear to identify Puerto Rico birds, with a practical observation exercise and cautions on aging.

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Family Learning

Backyard Bird Bingo: A Family Game

A 16-bird backyard bingo card with identification clues and family rules to learn bird ID at home, no field trip required.

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Identification

Bird Track and Sign Detective

Learn to read tracks, feathers and nests: a practical guide to indirect bird signs comparing heron, raptor and shorebird feet.

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Identification · Comparison

Compare Two Hummingbirds: Mango vs. Emerald

A comparison guide to the Puerto Rican Mango and Puerto Rican Emerald: size, bill, color, habitat, and sound, with observation questions.

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Learning · Identification

Dichotomous Key for Common Birds

Learn to use and build a dichotomous key to identify common Puerto Rico birds by color, size, bill, and habitat, with examples and exercises.

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Identification

Great Egret Breeding vs Nonbreeding Plumage

How the Great Egret's bill, lores, and nuptial plumes change between breeding and nonbreeding seasons, with field criteria.

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Identification

Cattle Egret Juvenile vs Adult Plumage

A practical guide to distinguishing juvenile and adult Western Cattle-Egret plumage, with field criteria and comparison to Snowy Egret.

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Identification

Juvenile Little Blue Heron vs Snowy Egret

A practical guide to telling a juvenile Little Blue Heron from a Snowy Egret using field marks, with an observation procedure and frequently asked questions.

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Identification

Green Heron vs Least Bittern

A practical guide to telling the Green Heron from the Least Bittern by size, posture, flight, habitat and behavior, using ornithological sources.

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Bird identification

Blue-winged Teal vs Northern Shoveler

A practical comparison of Blue-winged Teal and Northern Shoveler: bill, size, plumage, flight, and recorded status in Puerto Rico, with source-backed evidence.

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Identification

American Coot vs Common Gallinule

Compare the American Coot and Common Gallinule by bill and frontal shield color, with an observation routine and frequently asked questions.

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Identification

Purple Gallinule vs Common Gallinule

A practical comparison of Purple and Common Gallinules: bill, frontal shield, legs, color, and behavior, with a wetland observation procedure.

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Identification

Brown Pelican vs American White Pelican

Compare the Brown Pelican and American White Pelican: size, color, flight, feeding, and status in Puerto Rico, with a useful field checklist.

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Identification in flight

Magnificent Frigatebird vs Brown Pelican in Flight

Compare Magnificent Frigatebird and Brown Pelican silhouettes in flight: tail, wings, neck and posture. Includes an observation routine and FAQs.

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Identification

Red-tailed Hawk vs Osprey

Compare the shape and flight of the Red-tailed Hawk and Osprey in Puerto Rico. Learn to tell their wings, tail, and behavior apart in the air.

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Identification · Raptors

Peregrine Falcon vs Merlin

A practical comparison of the Peregrine Falcon and the Merlin: size, silhouette, flight, prey, and how to tell them apart in Puerto Rico.

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Identification

American Kestrel vs Merlin

A practical comparison of the American Kestrel and the Merlin: size, color, tail, flight, habits, and a step-by-step observation procedure for Puerto Rico.

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Identification

Scaly-naped Pigeon vs White-crowned Pigeon

Compare the Scaly-naped Pigeon and White-crowned Pigeon in Puerto Rico: field marks, habitat, movements, and an observation routine.

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Identification

White-winged Dove vs Mourning Dove

A practical comparison of White-winged Dove and Mourning Dove: wings, tail, size, silhouette, and habitat, plus a field observation procedure.

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Identification

Zenaida Dove vs Mourning Dove

Compare the Zenaida Dove and Mourning Dove by size, tail shape, and wing marks. Includes an observation routine and frequently asked questions.

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Identification

Common Ground Dove vs Zenaida Dove

A practical comparison of the Common Ground Dove and Zenaida Dove in Puerto Rico: size, plumage, habitat, and ground behavior.

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Identification

Greater Antillean Grackle vs Shiny Cowbird

A practical comparison of the Greater Antillean Grackle and Shiny Cowbird: bill, tail, size, eyes, and behavior for identification in Puerto Rico.

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Identification

Smooth-billed Ani vs Greater Antillean Grackle

Compare the Smooth-billed Ani and Greater Antillean Grackle by bill and tail shape, with an observation routine and FAQs.

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Identification

Northern Mockingbird vs Pearly-eyed Thrasher

A visual comparison of the Northern Mockingbird and Pearly-eyed Thrasher in Puerto Rico: size, bill, plumage, and behavior for identification.

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Identification

Puerto Rican Tody vs Puerto Rican Emerald

A practical comparison of the Puerto Rican Tody and the Puerto Rican Emerald: bill, color, flight, habitat, and habits for confident identification.

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Identification

Blackpoll Warbler vs Black-and-white Warbler

A practical comparison of Blackpoll and Black-and-white Warblers: patterns, behavior, and how to tell them apart in Puerto Rico.

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Identification

Prairie Warbler vs Palm Warbler

Compare Prairie and Palm Warblers: streaks, stripes, eyebrow, tail and behavior to identify them in Puerto Rico.

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Identification

Northern Waterthrush vs Louisiana Waterthrush

A practical comparison of Northern and Louisiana Waterthrushes: eyebrow, throat, bill, habitat, and behavior for confident identification.

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Identification

Spotted Sandpiper vs Solitary Sandpiper

A practical comparison of Spotted and Solitary Sandpipers: key marks, behavior, habitat, and a field routine to tell them apart.

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Shorebird identification

Greater Yellowlegs vs Lesser Yellowlegs

A practical comparison of Greater and Lesser Yellowlegs: size, bill, voice, habitat, and an observation routine to tell them apart in Puerto Rico.

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Identification

Western Sandpiper vs Semipalmated Sandpiper

A practical comparison of Western and Semipalmated Sandpipers: bill, shape, legs, and a step-by-step observation routine to avoid confusion.

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Identification

Sanderling vs Ruddy Turnstone

A practical comparison of Sanderling and Ruddy Turnstone: size, legs, bill, behavior, and coastal habitat in Puerto Rico.

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Identification

Killdeer vs Semipalmated Plover

A practical comparison of Killdeer and Semipalmated Plover: number of breast bands, size, proportions, and how to confirm each species in the field.

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Identification

Royal Tern vs Sandwich Tern

Compare Royal and Sandwich Terns by size, bill, and crest. Includes an observation procedure and frequently asked questions.

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Identification

Adult vs Juvenile Laughing Gull

Compare adult and juvenile Laughing Gulls: hood, bill, legs, and molt. Includes an observation routine and frequently asked questions.

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Introduced scavenger

Turkey Vulture in Puerto Rico: What It Is and How to Recognize It

The Turkey Vulture (aura tiñosa) was introduced to Puerto Rico from Cuba in the 1800s. Learn its field marks, where to see it, and why it soars in a V.

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Silhouettes in the sky

Turkey Vulture vs. Red-tailed Hawk: Telling Them Apart in Flight

Turkey Vultures soar with wings in a V and wobble; Red-tailed Hawks glide steady with a visible head and rusty tail. Six clues to tell them apart for good.

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Look up

Birds Circling in the Sky in Puerto Rico: A Silhouette Guide

What bird is circling overhead? In Puerto Rico it is usually a Turkey Vulture, Red-tailed Hawk, or frigatebird. ID them by wings, tail, and place.

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Owls, múcaros, and barn owls

Owls of Puerto Rico: the complete identification guide

Puerto Rico has three documented living owls: the endemic Puerto Rican Owl, the Short-eared Owl, and the Barn Owl. How to tell them apart and which owls are gone.

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Field comparison

Barn Owl vs. Puerto Rican Owl: how to tell them apart

The Barn Owl is large, pale, and heart-faced; the Puerto Rican Owl is small, brown, and round-headed. Compare size, voice, habitat, and the extinct cave owl.

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Identification answer

Are there eagles in Puerto Rico?

Puerto Rico has no resident eagles; the Bald Eagle is only an accidental visitor. The big fish hawk you see is usually an Osprey. Learn to tell them apart.

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Identification answer

Are there toucans in Puerto Rico?

Puerto Rico has no wild toucans; none appear on the official bird list. See which big-billed or colorful birds people mistake for them and why escapes happen.

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Identification answer

Are there flamingos in Puerto Rico?

The American Flamingo is now only a rare visitor to Puerto Rico; its former population is considered extirpated. Learn its history and how to identify it.

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Identification answer

Are there seagulls in Puerto Rico?

Yes: the Laughing Gull is the only gull that nests in Puerto Rico and is common April to September. Eleven other gulls are rare visitors. Learn how to identify them.

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Identification answer

Are there cardinals in Puerto Rico?

The Northern Cardinal does not live in Puerto Rico, and the Red-crested Cardinal is introduced and scarce. Meet the red and orange birds you will actually see.

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Lagoons, marshes, and reservoirs

Ducks of Puerto Rico: residents, migrants, and whistling-ducks

Four ducks nest in Puerto Rico, and all four are on the island's threatened lists. Learn to tell them apart, what a Gadwall is, and when migrants arrive.

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Rails of marsh and mangrove

Gallinules, coots, and rails of Puerto Rico

Puerto Rico's gallareta is the Common Gallinule: red shield, yellow tip, white flank stripe. Compare it with the coot, Purple Gallinule, and Clapper Rail.

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Coasts, bays, and cays

Are there pelicans in Puerto Rico? The Brown Pelican

Yes: the Brown Pelican is a resident that nests on cays off Lajas, Vieques, and Aguadilla. It left the federal list in 2009 but is still endangered in Puerto Rico.

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A single resident species

Are there woodpeckers in Puerto Rico?

Yes, but only one lives here: the Puerto Rican Woodpecker, an endemic with a red breast and black back. Where to see it, what it eats, and which others visit.

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Birds that dive

Grebes and cormorants of Puerto Rico

Two grebes breed in Puerto Rico, Pied-billed and Least; cormorants arrive only as rarities. Learn how to tell them from ducks and gallinules.

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Identify by color

Red birds

Puerto Rico has no Northern Cardinal, so red is usually a patch. Compare the woodpecker, tody, bishop, redstart, and rare red visitors.

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Identify by color

Blue birds

Puerto Rico's “gorrión azul” is the Indigo Bunting, a scarce migrant that can look brown in winter. Compare it with the grosbeak, warbler, and heron.

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Identify by color

Green birds

Tody, parrot, hummingbirds, and spindalis: Puerto Rico's green birds are mostly endemics. Learn to separate them from introduced parakeets.

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Identify by color

Yellow birds

The Bananaquit is the likeliest yellow bird in a Puerto Rico yard. Compare it with Adelaide's Warbler, Yellow Warbler, and yellow seed-eaters.

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Identify by color

White birds

Most white birds in Puerto Rico are egrets. Separate them by size, bill, and legs, then learn the tropicbirds, ibises, and rare white visitors.

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Names that travel

What bird is a chombo or a sucha?

Chombo and sucha are Latin American names for vultures, not Puerto Rican bird names. Puerto Rico's established vulture is the Turkey Vulture. See how to tell.

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Puerto Rican name

What is a mozambique?

In Puerto Rico a mozambique is the Greater Antillean Grackle, the yellow-eyed, V-tailed black bird of plazas and beaches. Learn to tell it from Shiny Cowbird.

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Ground-walking migrants

What bird is a pizpita?

In Puerto Rico, pizpita names three migratory warblers that walk and bob: the Ovenbird and two waterthrushes. Separate them by eyebrow, legs, and habitat.

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The forest kingbird

What bird is the clérigo?

The clérigo is the Loggerhead Kingbird, a sturdy, black-capped kingbird of Puerto Rico's woodlands and coffee farms. Here is how to tell it from the Gray Kingbird.

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Identification · Night-herons

Yellow-crowned vs. Black-crowned Night-Heron: telling Puerto Rico's yaboas apart

A yaboa is a night-heron. Yellow-crowned has a black-and-white face and eats crabs; Black-crowned has a black cap and back. Compare adults and juveniles.

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Identification · Endemic species

What is a comeñame? Puerto Rico's endemic bullfinch

The comeñame is the Puerto Rican Bullfinch, an endemic black bird with rufous patches. Learn its song, where it lives, and why the IUCN lists it as Vulnerable.

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Identification · Thrushes and thrashers

Pearly-eyed Thrasher vs. Red-legged Thrush: Puerto Rico's two 'zorzales'

Pearly-eyed Thrasher is brown, streaked, pale-eyed; Red-legged Thrush is gray with red legs and bill. How to tell them apart and why one worries conservationists.

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Caribbean parrots

The Hispaniolan Parrot in Puerto Rico

The Hispaniolan Parrot is not native to Puerto Rico; it arrived as an aviary bird and pet. Tell it from the Iguaca by its white forehead and maroon belly.

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Macaws

Are there macaws in Puerto Rico?

Yes: Blue-and-yellow Macaws breed in the wild around San Juan and Orocovis, while Red-and-green and Scarlet Macaws appear as escapes. Here is how to tell them apart.

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Names and silhouettes

Parrot vs. parakeet: the difference

In Puerto Rico, a cotorra (amazon parrot) is stocky and short-tailed; a perico (parakeet) is smaller with a long, pointed tail. Here is how to tell them apart.

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The big forest pigeon

Scaly-naped Pigeon in Puerto Rico: how to identify it and where to see it

The Scaly-naped Pigeon (paloma turca) is Puerto Rico's big gray forest pigeon with a wine-red, scaly neck. It is native: how to recognize, hear, and find it.

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One family, many names

Dove vs. pigeon: what the difference really is in Puerto Rico

There is no scientific difference: doves and pigeons are one family. In Puerto Rico the name tracks size and lifestyle. Here is how to tell them apart in the field.

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Plazas, bridges, and ledges

City pigeons in Puerto Rico: the Rock Pigeon

Puerto Rico's city pigeon is the Rock Pigeon (Columba livia), introduced and found in 72 % of the island. How to recognize it, where it nests, and its legal status.

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The forest floor

Quail-doves of Puerto Rico: three living species and one extinct

Puerto Rico has three living quail-doves—Ruddy, Key West, and Bridled—plus an extinct one. How to tell them apart, where they live, and why they are hard to see.

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The smallest dove

Common Ground Dove and Puerto Rico's small doves

The rolita (Common Ground Dove) is Puerto Rico's smallest native dove: 15–18 cm, a scaly breast, and rufous wings in flight. How to recognize it and where it lives.

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White egrets

Great Egret vs. Snowy Egret vs. Cattle Egret in Puerto Rico

Check bill and legs: Great Egret has a yellow bill and black legs, Snowy Egret yellow feet, and Cattle Egret is short and stocky in pastures.

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Ibises and spoonbills (Threskiornithidae)

Ibises in Puerto Rico: Scarlet, White, Glossy, and Spoonbill

Four Threskiornithidae have been recorded in Puerto Rico: Glossy Ibis, White Ibis, Scarlet Ibis, and Roseate Spoonbill. Where and how they have appeared.

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Dark herons

Blue Herons of Puerto Rico: Little Blue, Tricolored, and Great Blue

Little Blue Heron is small and all dark, Tricolored has a white belly, and Great Blue is the giant gray winter visitor. Field marks, seasons, and places.

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Pointed wings

Falcons of Puerto Rico

Puerto Rico has one resident falcon, the American Kestrel, plus three visitors: Merlin, Peregrine, and a 2008 Aplomado. How to tell them apart.

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Introduced estrildids

Munias, Mannikins, and Waxbills of Puerto Rico

Scaly-breasted Munia, Bronze Mannikin, Orange-cheeked Waxbill, Java Sparrow and more: how to identify Puerto Rico's 9 introduced estrildids and where they breed.

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Bishops and weavers

Northern Red Bishop and Yellow-crowned Bishop

Northern Red Bishop and Yellow-crowned Bishop are African weavers first recorded in Puerto Rico in 1971. How to identify them, when they breed, and where to look.

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Mynas and starlings

Mynas and Starlings in Puerto Rico

Common Myna, Common Hill Myna, and European Starling are all introduced and scarce in Puerto Rico. How to identify them and tell them from grackles and cowbirds.

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Brood parasitism

Shiny Cowbird in Puerto Rico

Shiny Cowbird reached Puerto Rico on its own by 1955 and lays its eggs in other birds' nests. How to identify it and why it nearly wiped out the mariquita.

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Look-alike birds

Gray Kingbird vs. Loggerhead Kingbird

Loggerhead Kingbird has a black head and a square, pale-tipped tail; Gray Kingbird is gray with a mask and notched tail. Compare habitat, voice, and behavior.

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Look-alike birds

Bananaquit vs. Adelaide's Warbler

Adelaide's Warbler has a yellow throat and two white wing bars; the Bananaquit has a gray throat and a curved bill. Field marks, habitat, and behavior compared.

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Look-alike birds

Northern Mockingbird vs. Red-legged Thrush

The Red-legged Thrush has orange-red legs, bill, and eye ring; the mockingbird is gray with white wing and tail patches. Compare size, habitat, and nests.

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Look-alike birds

Swallows vs. Swifts in Puerto Rico

Swifts have crescent wings, never line up on wires, and are related to hummingbirds; swallows are songbirds. A guide to Puerto Rico's species and their seasons.

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Look-alike birds

Grassquits and Sparrows of Puerto Rico

Black-faced Grassquits have a black face and breast; Yellow-faced show a yellow throat and brow. Separate grassquits, the bullfinch, and introduced sparrows.

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Sand, surf, and shore

Beach Birds of Puerto Rico

Puerto Rico beach birds: sandpipers, plovers, terns, pelicans, and gulls. Names, field marks, and which months to find each one on the sand.

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Practice with familiar species

Notice shape first.

Open a profile, study its field marks, and continue to related species.

Bananaquit

Coereba flaveolaView profile →

Gray Kingbird

Tyrannus dominicensisView profile →

Puerto Rican Woodpecker

Melanerpes portoricensisView profile →

Scaly-naped Pigeon

Patagioenas squamosaView profile →

Narrow the field

Explore useful identification sets.

39 birds

Town & Garden Birds

Adaptable birds found in gardens, parks, towns, plantations and other human-shaped landscapes.

8 birds

Hummingbirds (Trochilidae)

Meet the 8 Puerto Rico bird records in the family Trochilidae.

15 birds

Herons, Egrets, and Bitterns (Ardeidae)

Meet the 15 Puerto Rico bird records in the family Ardeidae.

The next clue