Biology

Featured Species

Northern Pintail (Anas acuta)

Featured Content

American Yellowrocket

American Yellowrocket (Barbarea orthoceras) is a species of the class Magnoliopsida in the family Brassicaceae (Mustards) a...

Cardinal Meadowhawk

Cardinal Meadowhawk (Sympetrum illotum) is a species of the class Insecta (Insects) in the family Libellulidae (Skimmers) a...

Lustrous Copper

Lustrous Copper (Lycaena cuprea) is a species of the class Insecta (Insects) in the family Lycaenidae (Gossamer-wing Butter...

Creamcups

Creamcups (Platystemon californicus) is a species of the class Magnoliopsida in the family Papaveraceae (Poppies) and order...

Tropical Kingbird

Tropical Kingbird (Tyrannus melancholicus) is a species of the class Aves (Birds) in the family Tyrannidae (Tyrant Flycatch...

Harris's Antelope Squirrel

Harris's Antelope Squirrel (Ammospermophilus harrisii) is a species of the class Mammalia (Mammals) in the family Sciuridae...

Recent Content

Northern Shrike

Lanius borealis

Juneberry

Amelanchier alnifolia

Blue Grosbeak

Passerina caerulea

Wild Turkey

Meleagris gallopavo

Western Yellowjacket

Vespula pensylvanica

Glorybush

Tibouchina urvilleana

Colonus hesperus

Colonus hesperus

Lesser Nighthawk

Chordeiles acutipennis

American Tree Sparrow

Spizelloides arborea

Featured Illustrations

Kentish Plover
Kentish Plover
Oriental Magpie
Oriental Magpie
Northern Parula
Northern Parula

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.