Heather Angel / Giant panda (Ailuropoda melanoleuca) sliding down slope on back after losing footing. Panda Breeding Centre, Wolong, Sichuan, China. January 1987.
01589418
David Perpinan / Blue fronted amazon (Amazona aestiva) chicks, confiscated from illegal wildlife trade, Brazil.
Frederique Olivier / Southern rockhopper penguin (Eudyptes chrysocome) at nest in breeding colony, stretching and knocking chick over, New Island, Falkland Islands.
01528545
Peter Bassett / King penguins (Aptenodytes patagonicus) wading through mud and falling over, Prion Island, South Georgia.
01396957
Andy Rouse / Young Cheetah (Acinonyx jubatus) learning how to hunt Thomson's gazelle fawn (Eudorcas thomsoni) Masai Mara National Reserve, Kenya
01396938
Andy Rouse / Cheetah (Acinonyx jubatus) catching Thomson's gazelle fawn (Eudorcas thomsoni) Masai Mara National Reserve, Kenya
01599505
Staffan Widstrand / Wild Wonders of China / White eared pheasant (Crossoptilon crossoptilon) tripping up over some vegetation, Baima Snow Mountain Nature Reserve, Yunnan, China, October.
Frederique Olivier / Group of Emperor penguin (Aptenodytes forsteri) chicks walking to the sea, stumbling on rough ice, Adelie Land, Antarctica, January.
01577453
Frederique Olivier / Group of Emperor penguin (Aptenodytes forsteri) chicks walking to the sea, stumbling on rough ice, Adelie Land, Antarctica, January.
01577452
Frederique Olivier / Group of Emperor penguin (Aptenodytes forsteri) chicks walking to the sea, stumbling on rough ice, one falls in, Adelie Land, Antarctica, January.