Shattil & Rozinski / Green heron {Butorides virescens} Texas, USA

Bernard Castelein / Four Crowned cranes {Balearica regulorum} Kenya.

Richard Du Toit / Black crake (Amaurornis flavirostra) and oxpeckers feeding on hippo. Moremi reserve, Botswana, Southern Africa

Tom Vezo / Mallard duck male and female pair swimming {Anas platyrhynchos} Long Island, USA

Yves Lanceau / Padoue White Padovana Hen, cock, studio portrait

Yves Lanceau / Sebright Bantam Hen, golden cock walking, showing aggression, France

Yves Lanceau / Domestic crossbreed hen (Gallus gallus domesticus), chick embryo developing in egg, chick ready to hatch, 20 days, sequence 10/10

Yves Lanceau / Domestic crossbreed hen (Gallus gallus domesticus), chick embryo developing in egg, chick ready to hatch, 20 days, sequence 10/10

Yves Lanceau / Domestic crossbreed hen (Gallus gallus domesticus), chick embryo developing in egg, embryo developing feathers, yolk volume greatly reduced, 18 days, sequence 9/10

Yves Lanceau / Domestic crossbreed hen (Gallus gallus domesticus), chick embryo developing in egg, embryo developing feathers, yolk volume greatly reduced, 15 days, sequence 8/10

Yves Lanceau / Domestic crossbreed hen (Gallus gallus domesticus), chick embryo developing in egg, 11 days, sequence 7/10

Yves Lanceau / Domestic crossbreed hen (Gallus gallus domesticus), chick embryo developing in egg, 11 days, sequence 7/10