Biology

Featured Species

Rufous-tailed Hummingbird (Amazilia tzacatl)

Featured Content

Ringed Teal

Overview The Ringed Teal (Callonetta leucophrys) is a species of waterfowl (family Anatidae) in the ord...

California Sister

California Sister (Adelpha californica) is a species of the class Insecta (Insects) in the family Nymphalidae (Brushfooted ...

Romero

Romero (Rosmarinus officinalis) is a species of the class Magnoliopsida in the family Lamiaceae (Mints) and order Lamiales.

Powderpuff Tree

Powderpuff Tree (Albizia julibrissin) is a species of the class Magnoliopsida in the family Fabaceae (Peas) and order Fabal...

Palm Tanager

Palm Tanager (Thraupis palmarum) is a species of the class Aves (Birds) in the family Thraupidae (Tanagers and Allies) and ...

Tricolored Blackbird

Tricolored Blackbird (Agelaius tricolor) is a species of the class Aves (Birds) in the family Icteridae (Troupials and Alli...

Recent Content

Red-winged Wave

Dasyfidonia avuncularia

Berylline Hummingbird

Saucerottia beryllina

Juneberry

Amelanchier alnifolia

Zebra-tailed Lizard

Callisaurus draconoides

Crimson Bottlebrush

Callistemon citrinus

Lesser Nighthawk

Chordeiles acutipennis

Yellow Star-thistle

Centaurea solstitialis

American Tree Sparrow

Spizelloides arborea

Mountain Pride

Penstemon newberryi

Featured Illustrations

Black-winged Stilt
Black-winged Stilt
Orange-breasted Sunbird
Orange-breasted Sunbird
Gray-headed Woodpecker
Gray-headed Woodpecker

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.