whistling swan

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White-throated sparrow (Zonotrichia albicollis) at Shenandoah National Park, Virginia. (birds)

15 of the Best Birdsongs (According to Britannica)

Common, or southern, cassowary (Casuarius casuarius).

8 Birds That Can’t Fly

Black-headed gulls perching on a roof with bird droppings, often seen in flocks around London, England, in winter time. The "black head" develops during the breeding season. (black headed, birds, guano, bird poop)

Spider monkey swinging in a tree. (primate, jungle animal)

Why Do Animals Have Tails?

animal. Amphibian. Frog. Anura. Ranidae. Frog in grass.

Abundant Animals: The Most Numerous Organisms in the World

Discover

Nativity Scene, Adoration of the Magi, Church of the Birth of the Virgin Mary, Montenegro

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King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.

What’s the Difference Between Bison and Buffalo?

Small, white rat (genus Rattus) on a glass table. (rodent, laboratory, experiment)

Cruel and Unusual Punishments: 15 Types of Torture

Ruminant. Deer. Red deer. Cervus elaphus. Buck. Stag. Antlers.

9 of the World’s Deadliest Mammals

Eye. Eyelash. Eyeball. Vision.

7 Vestigial Features of the Human Body

Mother tickling her daughter, sitting in a garden

Why Can’t You Tickle Yourself?

whistling swan: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Facts

Also Known As	Cygnus columbianus • tundra swan

Photos

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Topics

Cygnus trumpeter swan

Quiz

Sea otter (Enhydra lutris), also called great sea otter, rare, completely marine otter of the northern Pacific, usually found in kelp beds. Floats on back. Looks like sea otter laughing. saltwater otters

Animal Group Names

Mute swan with cygnet. (birds)

Match the Baby Animal to Its Mama Quiz

Lion (panthera leo)

Deadliest Animals Quiz

vulture. An adult bearded vulture at a raptor recovery center. The Gypaetus barbatus also known as the Lammergeier or Lammergeyer, is a bird of prey and considered an Old World vulture.

Animal Factoids

Young chimpanzee dressed in a shirt and sweater vest, scratching his head thinking. (primates)

Wild Words from the Animal Kingdom Vocabulary Quiz

turkey vulture. vulture. Close-up of a head and beak of a Turkey vulture (Cathartes aura).

A Little Bird Told Me

List

Common, or southern, cassowary (Casuarius casuarius).

8 Birds That Can’t Fly

animal. Amphibian. Frog. Anura. Ranidae. Frog in grass.

Abundant Animals: The Most Numerous Organisms in the World

White-throated sparrow (Zonotrichia albicollis) at Shenandoah National Park, Virginia. (birds)

15 of the Best Birdsongs (According to Britannica)

Demystified

Black-headed gulls perching on a roof with bird droppings, often seen in flocks around London, England, in winter time. The "black head" develops during the breeding season. (black headed, birds, guano, bird poop)

Do Birds Pee?