Jose B. Ruiz / Newly hatched European cuckoo (Cuculus canorus) nestling ejecting Rufous bush robin (Cercotrichas galactotes) chick from nest. . Spain.

Pete Oxford / Great frigate bird with chick {Fregata minor} Genovesa, Galapagos.

Pete Oxford / Blue footed booby with chick {Sula nebouxii} Espanola Is, Galapagos

Pete Oxford / Blue footed booby feeding chick {Sula nebouxii} Espanola Is, Galapagos

David Kjaer / Nightjar (Caprimulgus europaeus) adult and chick at nest scrape. England

John Cancalosi / White stork {Ciconia ciconia} pair at nest with chick, male displaying. Spain.

Pete Oxford / Great frigate bird chick, Genovesa, Galapagos.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) chick resting on feet of adult, Atka Bay, Antarctica. (NON-EX.)