Species library

Oak Toad

Anaxyrus quercicus

Meet the Oak Toad, a pint-sized powerhouse and North America's smallest toad species. Distinguished by its signature ...

Amphibians

Oblique-swimming Triplefin

Forsterygion maryannae

New Zealand's vibrant reef socialite, the Oblique-swimming Triplefin, breaks all the rules of its family by schooling...

Fish

obscure white-toothed shrew

Crocidura obscurior

The obscure white-toothed shrew is a miniature marvel of the West African rainforest. Often hidden beneath the leaf l...

Mammals

Oceanic Manta Ray

Mobula birostris

The Oceanic Manta Ray is the undisputed giant of the rays, a silent glider of the open seas with a wingspan that can ...

Fish

Oceanic Triggerfish

Canthidermis sufflamen

A hardy wanderer of the Western Atlantic, the Oceanic Triggerfish is a master of the open blue. Known for its leather...

Fish

Oceanic Whitetip Shark

Carcharhinus longimanus

The ultimate nomad of the deep blue, the Oceanic Whitetip Shark is a bold, inquisitive predator known for its iconic ...

Fish

Ocellated Turkey

Meleagris ocellata

Meet the peacock of the turkey world. With its shimmering iridescent feathers and striking blue-and-orange head, the ...

Birds

Ocellated Wrasse

Symphodus ocellatus

The Ocellated Wrasse is the Mediterranean's most diligent architect, famous for building complex algae nests. Its str...

Fish

Ocelot

Leopardus pardalis

Often called the most beautiful cat in the world, the ocelot is a master of the night. With its mesmerizing chain-lik...

Mammals

Ochre-breasted Foliage-gleaner

Anabacerthia lichtensteini

A restless acrobat of the South American canopy, the Ochre-breasted Foliage-gleaner is a master of the Atlantic Fores...

Birds

Ochre-lored Flatbill

Tolmomyias flaviventris

With its sun-drenched plumage and specialized wide bill, the Ochre-lored Flatbill is a master of the tropical canopy....

Birds

Ocola Skipper

Panoquina ocola

The Ocola Skipper is a master of high-speed maneuvers, easily identified by its exceptionally long wings and chocolat...

Insects

Ogilby's Duiker

Cephalophorus ogilbyi

A hidden gem of the African rainforest, the Ogilby's Duiker is a master of the undergrowth. With its striking mahogan...

Mammals

Oleander Aphid

Aphis nerii

The Oleander Aphid is a tiny, brilliant yellow gem of the garden world. Often found in bustling colonies on milkweed,...

Insects

Olinguito

Bassaricyon neblina

Meet the 'mist-walker' of the Andes, a teddy-bear-faced mammal that remained hidden from science until 2013. This elu...

Mammals

Olivaceous Woodcreeper

Sittasomus griseicapillus

The ultimate tree-climber of the tropics, the Olivaceous Woodcreeper is a master of the vertical world. With its sign...

Birds

Olive Baboon

Papio anubis

The Olive Baboon is a master of adaptation, thriving across the diverse landscapes of Africa with its keen intelligen...

Mammals

Olive-backed Pipit

Anthus hodgsoni

A woodland-loving traveler with a rhythmic tail-wag, the Olive-backed Pipit is a master of camouflage in the forest s...

Birds

Olive House Snake

Elaiophis inornatus

Glossy and graceful, the Olive House Snake is a nocturnal guardian of the garden. This harmless constrictor is a mast...

Reptiles

Olive Ibis

Bostrychia olivacea

A master of the African forest shadows, the Olive Ibis is a secretive bird known for its stunning iridescent wings an...

Birds

Olive Keelback

Helicops modestus

A hidden gem of the Brazilian wetlands, the Olive Keelback is a master of the underwater ambush. This non-venomous, s...

Reptiles

Olive Oropendola

Psarocolius bifasciatus

Meet the architect of the Amazonian canopy. As South America's largest songbird, the Olive Oropendola dominates the s...

Birds

Olive Ridley Sea Turtle

Lepidochelys olivacea

The Olive Ridley is the world's most numerous sea turtle, best known for its 'arribadas'—massive, synchronized nestin...

Reptiles

Olive Rockfish

Acanthoclinus fuscus

A master of the New Zealand shoreline, the Olive Rockfish is an eel-like survivor that can breathe air and guard its ...

Fish

Olive-sided Flycatcher

Contopus cooperi

A champion of the high canopy, the Olive-sided Flycatcher is famous for its dapper 'vested' plumage and its ringing f...

Birds

Olive Sparrow

Arremonops rufivirgatus

A secretive resident of the southern brushlands, the Olive Sparrow is a splash of subtle color in the thickets. Known...

Birds

Olive-throated Parakeet

Eupsittula nana

A social and spirited resident of the tropical lowlands, the Olive-throated Parakeet is known for its earthy olive pl...

Birds

Olympic Marmot

Marmota olympus

The charismatic mascot of Washington's high peaks, the Olympic Marmot is a social, whistling wonder found nowhere els...

Mammals

Onager

Equus hemionus

The Onager is the desert's endurance athlete, a wild and hardy equid that thrives in the vast steppes of Asia. Known ...

Mammals

One-spotted Stink Bug

Euschistus variolarius

A common but often overlooked resident of North American gardens, the One-spotted Stink Bug is a marvel of natural ca...

Insects

Opaleye

Girella nigricans

Boasting brilliant sapphire eyes and a calm, grazing nature, the Opaleye is the 'underwater goat' of the California c...

Fish

Orange-bellied Euphonia

Euphonia xanthogaster

A tiny, vibrant spark of the tropical canopy, the Orange-bellied Euphonia is famous for its stunning citrus-colored p...

Birds

Orange-billed Sparrow

Arremon aurantiirostris

Meet the dapper ground-dweller of the tropics. With its neon-orange beak and striking tuxedo-like head stripes, the O...

Birds

Orange-chinned Parakeet

Brotogeris jugularis

Meet the vibrant and chatty socialite of the Neotropical suburbs. With its brilliant green plumage and a hidden flash...

Birds

Orange-crowned Warbler

Leiothlypis celata

A master of movement in the garden thicket, the Orange-crowned Warbler is a subtle beauty for the patient observer. T...

Birds

Orange-eared Tanager

Chlorochrysa calliparaea

A shimmering emerald gem of the Andes, the Orange-eared Tanager brings a flash of brilliant color to the misty cloud ...

Birds