Animals

Western rattlesnake

Western toad

Westlothiana

Westlothiana: an early tetrapod from the Carboniferous

Whale

Whale: biology, classification, and human interactions

Whale shark

Whale shark (Rhincodon typus)

Whelk

Whelk (marine gastropod)

Whirligig beetle

Whirligig beetle (Gyrinidae): surface-swimming water beetles

Whisker

White bass

White bass (Morone chrysops)

White rhinoceros

White rhinoceros (Ceratotherium simum)

White wagtail

White wagtail (Motacilla alba)

A concise encyclopedia article on the white wagtail, covering identification, behavior, range, breeding, and its relationship with people.

White-backed vulture

White-backed vulture (Gyps africanus)

White-bellied sea eagle

White-crested cockatoo

White-crested cockatoo (Cacatua alba): overview, traits, and conservation

White-headed capuchin

White-headed capuchin (white-faced capuchin)

White-lipped tree frog

White-tailed deer

White-tailed eagle

Whitetip reef shark

Whooper swan

Whooper swan (Cygnus cygnus): description, range, behaviour and status

Wikispecies

Wikispecies — an open directory of taxonomic information

Wild boar

Wild boar (Sus scrofa): biology, range, behavior and human relationships

Wild goat

Wild turkey

Wild turkey (Meleagris gallopavo)

Wild yak

Wild yak (Bos mutus): description, habitat, behavior and conservation

The wild yak (Bos mutus) is a large high‑altitude bovid native to the Tibetan Plateau and Himalayas. This article covers its appearance, ecology, relationship with domestic yak, th

Wildebeest

Wildebeest (Gnu): overview, behavior, and conservation

Willow grouse

Willow grouse (willow ptarmigan) — Lagopus lagopus

Wilson's bird-of-paradise

Wing

Winghead shark

Wintonotitan

Wisent

Wisent (European bison)

The wisent or European bison (Bison bonasus) is Europe’s largest wild land mammal. This article covers its appearance, distribution, conservation history, ecology, and differences

Witchetty grub

Witchetty grub: larval insect, cultural food, and natural history

Wiwaxia

Wiwaxia: Cambrian sclerite-bearing animal from the Burgess Shale

Wolf

Wolf (Canis lupus): biology, behavior, and relationship with humans

An overview of the grey wolf (Canis lupus): taxonomy, appearance, behavior, range, subspecies, conservation status, and its role in dog domestication and human culture.

Wolf spider

Wolf spider (Lycosidae): biology, behavior, and human interactions

Wolf spiders (family Lycosidae) are ground-dwelling hunting spiders known for maternal care, active stalking behavior, and a wide range of sizes and habitats worldwide.

Wolterstorffina

Wolterstorffina — a genus of African true toads

Wolverine

Wolverine (Gulo gulo) — large northern mustelid

Wombat

Wonder Pets

Wonder Pets! — preschool animated series about teamwork and rescue

Wood frog

Wood frog (Rana sylvatica): description, habitat, and life cycle

Wood mouse

Wood mouse (Apodemus sylvaticus)

Woodland dormouse

Woodland dormouse (Graphiurus murinus)

Woodpecker

Woodpecker (Picidae): characteristics, behavior, taxonomy and conservation

Woodpecker finch

Woodward's wallaroo

Woodward's wallaroo (Macropus bernardus)

Woolly dormouse

Woolly dormouse (Dryomys laniger)

Woolly mammoth

Woolly mammoth (Mammuthus primigenius) — Ice Age elephant