Barn Swallow
Barn swallows breeding in Britain spend the winter in South Africa, flying about 10,000 km each way.
Bird
Bearded Vulture
The bearded vulture lives mainly on bones: it drops large bones onto rocks from a height to smash them, then swallows the pieces.
Bee Hummingbird
The bee hummingbird is the smallest bird in the world, weighing less than a small coin.
Bengal Florican
In the breeding season, male Bengal floricans leap high above the grass in spectacular display flights, flashing their white wings against their black bodies.
Blue Jay
By burying thousands of acorns and forgetting some, blue jays may have helped oak forests spread north after the last Ice Age.
Blue-footed Booby
The bright blue of a booby’s feet comes from pigments in fresh fish, so brighter feet signal a healthier, better-fed partner.
Budgerigar
After rains in inland Australia, wild budgerigars can gather in flocks of thousands, swirling through the sky like starling murmurations.
Burrowing Owl
When threatened in their burrow, young burrowing owls make a hissing call that sounds remarkably like a rattlesnake.
California Condor
In 1987, the last 27 California condors were captured for captive breeding. Today there are more than 500, over half flying free.
Canada Goose
Flying in a V-formation saves energy, as each goose rides the rising air from the wingtips of the bird ahead.