bird flu

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Prairie falcon (Falco mexicanus) in mid-flight.

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Hungry Pelican waiting to be fed, beak open, Australia

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Shoebill. A Shoebill Stork (Balaeniceps rex), aka 'Whalehead' standing in shallow marsh. Resides in tropical East Africa. A very large bird related to the storks. It derives its name from its massive shoe-shaped bill.

Funky Feathers: 10 Bizarre Birds

Close-up of ostriches (Struthio camelus) necks and heads; location unknown.

6 of the World's Most Dangerous Birds

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)

Discover

Computer mapping, woman at early 1990s computer

Timeline of the 1990s

US Marines firing at Fallujah, Iraq, during the Second Battle of Fallujah in November 2004. Operation Iraqi Freedom, Iraq War.

Timeline of the 2000s

Black widow spider

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An ancient egyptian hieroglyphic painted carving showing the falcon headed god Horus seated on a throne and holding a golden fly whisk. Before him are the Pharoah Seti and the goddess Isis. Interior wall of the temple to Osiris at Abydos, Egypt.

11 Egyptian Gods and Goddesses

Turtle, tortoise, reptile. Uses assets 88582 & 89606

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Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

Estimated battle casualties, Normandy invasion, World War II. WWII, D-Day

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bird flu: Facts & Related Content

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

Last Updated: May 28, 2025

News •

Cambodia reports 11-year-old boy is country's fourth bird flu death this year • May 28, 2025, 6:38 AM ET (AP)

Facts

Also Known As	avian influenza

Topics

fowl plague bird H5N1 virus influenza type A virus poultry disease AIDS malaria polio tuberculosis plague Ebola influenza smallpox hepatitis yellow fever

Key People

Chan, Margaret

Margaret Chan

Chinese civil servant

Quiz

44 Questions from Britannica’s Most Popular Health and Medicine Quizzes