Edwin Giesbers / RF- Giant panda (Ailuropoda melanoleuca) feeding on bamboo in snow. Captive born in 2000, occurs in China. (This image may be licensed either as rights managed or royalty free.)

Edwin Giesbers / RF- Northern gannet (Morus bassanus) pair, Heligoland, Germany. April.

Wild Wonders of Europe / Widstrand / RF- Eurasian brown bear (Ursus arctos) running, Suomussalmi, Finland. July. (This image may be licensed either as rights managed or royalty free.)

Wild Wonders of Europe / Widstrand / RF- Eurasian brown bear (Ursus arctos) close-up of face, Suomussalmi, Finland. July. (This image may be licensed either as rights managed or royalty free.)

Wild Wonders of Europe / Widstrand / RF- Eurasian brown bear (Ursus arctos) mother walking with cub, Suomussalmi, Finland. July. (This image may be licensed either as rights managed or royalty free.)

Doug Perrine / RF- Atlantic sailfish (Istiophorus albicans) attacking bait ball of Spanish sardines (Sardinella aurita) near Yucatan Peninsula, Mexico, Caribbean Sea. (This image may be licensed either as rights man...

Rolf Nussbaumer / RF- Sword-billed Hummingbird (Ensifera ensifera) female feeding from Passion flower (Passiflora mixta). Papallacta, Ecuador, Andes, South America. January. (This image may be licensed either as rights...

Edwin Giesbers / RF- Gentoo Penguin (Pygoscelis papua) chick begging parent for food, Antarctica. (This image may be licensed either as rights managed or royalty free.)

Edwin Giesbers / RF- Red Deer (Cervus elaphus) stag and three does silhouette grazing. Dyrehaven, Denmark. (This image may be licensed either as rights managed or royalty free.)

Edwin Giesbers / RF- Red eyed tree frog (Agalychnis callidryas) on heliconia plant, Costa Rica. (This image may be licensed either as rights managed or royalty free.)

Rolf Nussbaumer / RF- Vermilion Flycatcher (Pyrocephalus rubinus) male giving insect to female for young in nest. Lake Corpus Christi, Texas, USA. May. (This image may be licensed either as rights managed or royalty fr...

Rolf Nussbaumer / RF- Bullfrog (Rana catesbeiana) adult on American lotus lilypad. Welder Wildlife Refuge, Sinton, Texas, USA. (This image may be licensed either as rights managed or royalty free.)