Biology

Featured Species

American Bison (Bison bison)

Featured Content

Reddish Egret

Reddish Egret (Egretta rufescens) is a species of the class Aves (Birds) in the family Ardeidae (Herons, Egrets, and Bitter...

Ring-billed Gull

Ring-billed Gull (Larus delawarensis) is a species of the class Aves (Birds) in the family Laridae (Gulls, Terns, and Skimm...

Red-footed Booby

Red-footed Booby (Sula sula) is a species of the class Aves (Birds) in the family Sulidae (Boobies and Gannets) and order S...

Meerkat

Meerkat (Suricata suricatta) is a species of the class Mammalia (Mammals) in the family Herpestidae (Civets) and order Carn...

Horned Grebe

Horned Grebe (Podiceps auritus) is a species of the class Aves (Birds) in the family Podicipedidae (Grebes) and order Podic...

White-shouldered Tanager

White-shouldered Tanager (Loriotus luctuosus) is a species of the class Aves (Birds) in the family Thraupidae (Tanagers and...

Recent Content

Colonus hesperus

Colonus hesperus

Mangrove Yellow Warbler

Setophaga petechia

Zebra-tailed Lizard

Callisaurus draconoides

Gophersnake

Pituophis catenifer

Blue-gray Gnatcatcher

Polioptila caerulea

Bridled Titmouse

Baeolophus wollweberi

Broad-tailed Hummingbird

Selasphorus platycercus

Williamson's Sapsucker

Sphyrapicus thyroideus

Gray Hawk

Buteo plagiatus

Featured Illustrations

Malayan Banded-Pitta
Malayan Banded-Pitta
Cape Sugarbird
Cape Sugarbird
Sandwich Tern
Sandwich Tern

Galleries

Gallery of Butterflies and Moths
Gallery of Butterflies and Moths
Gallery of California Plants
Gallery of California Plants
Gallery of California Wildflowers
Gallery of California Wildflowers
Gallery of Dragonflies
Gallery of Dragonflies
Gallery of Frogs
Gallery of Frogs
Gallery of Hummingbirds
Gallery of Hummingbirds
Gallery of Woodpeckers
Gallery of Woodpeckers

Lists

Birds of United States

Commonly observed birds in United States

List of Domains of Life

A list of the domains of life.

List of Kingdoms of Life

A list of the kingdoms of life.