I'm not sure whether you know

by Sean Bonnington

Preening gland

by Lauren

bluetits nesting

by Wendy Read

Sexing chickens

by eileen girling

night fliers

by Phyllis

Mating display by blackbird

by Mike Simpson

'Hammering' bluetits?

by trevor stamford

Bird Flocking

by June

Egyptian Vulture

by Colin Turvey

birds nests

by jerry

Birds senses

by Timo Scheidel

Long-tailed Tits

by Rowan B-L

feathered legs

by Carolyn

Future Terror Birds?

by Cody Lake

Bird evolution

by Esme

Chicken Egg

by Thomas

Pigeon nesting

by Moira George