1.   A tiny reed warbler, faced with a cuckoo, feeds a chick much larger than herself.

2.   After they are separated, the keepers feed the chicks by hand and must teach them to swallow whole fish.

3.   The mother bird will feed her chicks until they are able to fly.

4.   The parents then feed the chick for up to a year.

5.   The sky had darkened, clouds had gathered, and birds were returning, flying in belatedly to feed their chicks.

6.   They too are going to nest and they will rely on puffin meat to feed their chicks.

7.   Pairs breeding along acidic streams laid their eggs slightly later, laid fewer, lighter eggs and fed their chicks less often.

8.   Another picture, made during a trip last year, was of a mother emperor penguin trying vainly to feed her chick, whose beak had frozen closed.

9.   A pair of California condors have hatched and are successfully feeding a chick in the wild, marking an important step toward survival of a species skirting extinction.