stifftail

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

Abundant Animals: The Most Numerous Organisms in the World

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?

Common, or southern, cassowary (Casuarius casuarius).

8 Birds That Can’t Fly

Hungry Pelican waiting to be fed, beak open, Australia

Why Don’t Birds Have Teeth?

Discover

Aphrodite. Greek mythology. Sculpture. Aphrodite is the Greek goddess of love and beauty.

12 Greek Gods and Goddesses

Hemp (Cannabis sativa).

9 Mind-Altering Plants

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

9 of the World’s Deadliest Mammals

Bar graph of the United States Death Toll during major events. Infogram chart.

U.S. Death Toll During Major Events

A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England

Inventors and Inventions of the Industrial Revolution

Statue of Liberty in front of the skyline of Manhattan, New York City, New York.

Who Was the Woman Behind the Statue of Liberty?

Meghan, Duchess of Sussex in 2019. (Meghan Markle, British royalty)

6 Things You Should Know About Meghan, Duchess of Sussex

stifftail: Facts & Related Content

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

Facts

Also Known As	Oxyurini • stiff-tailed duck

Photos

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Topics

black-headed duck masked duck ruddy duck white-headed duck Anatinae pochard perching duck dabbling duck diving duck

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

Lion (panthera leo)

Deadliest Animals 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

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

A Little Bird Told Me

Mute swan with cygnet. (birds)

Match the Baby Animal to Its Mama Quiz

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

Wild Words from the Animal Kingdom Vocabulary Quiz

List

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

15 of the Best Birdsongs (According to Britannica)

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

Abundant Animals: The Most Numerous Organisms in the World

Common, or southern, cassowary (Casuarius casuarius).

8 Birds That Can’t Fly

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?