Rolf Nussbaumer / RF- Green jay pair (Cyanocorax yncas). Texas, USA. (This image may be licensed either as rights managed or royalty free.)

Denis-Huot / RF- African jacana (Actophilornis africanus) walking on water lettuces, Masai Mara Game Reserve, Kenya, September. (This image may be licensed either as rights managed or royalty free.)

Edwin Giesbers / RF- Atlantic puffin (Fratercula arctica) Farne Islands, Northumberland, UK. June. (This image may be licensed either as rights managed or royalty free.)

Rolf Nussbaumer / RF- American bald eagle calling (Haliaeetus leucocephalus). Alaska, USA. (This image may be licensed either as rights managed or royalty free.)

Edwin Giesbers / RF- Male Indian peafowl (Pavo cristatus) head portrait, captive. (This image may be licensed either as rights managed or royalty free.)

Edwin Giesbers / RF- Rainbow lorikeet (Trichoglossus haematodus) head portrait, captive. (This image may be licensed either as rights managed or royalty free.)

Ross Hoddinott / RF- Robin (Erithacus rubecula) portrait in snow. Near Bradworthy, Devon, UK. January. (This image may be licensed either as rights managed or royalty free.)

Staffan Widstrand / RF- Male Black grouse (Tetrao tetrix) displaying. Vastmanland, Sweden. (This image may be licensed either as rights managed or royalty free.)

Rolf Nussbaumer / RF- Hairy woodpecker (Picoides villosus) male on aspen tree. Grand Teton National Park, Wyoming, USA. (This image may be licensed either as rights managed or royalty free.)

Ross Hoddinott / RF- Mute swan cygnet (Cygnus olor) in nest with eggs. Abbotsbury, Dorset, UK. (This image may be licensed either as rights managed or royalty free.)

Rolf Nussbaumer / RF- Profile portrait of Greater Roadrunner (Geococcyx californianus). Starr County, Rio Grande Valley, Texas, USA. May. (This image may be licensed either as rights managed or royalty free.)

Rolf Nussbaumer / RF- Adult Willow tit (Poecile montanus) perched on frost covered Norway Spruce (Picea abies) at minus 15 Celsius. St. Moritz, Switzerland. December. (This image may be licensed either as rights manage...

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...

Rolf Nussbaumer / RF- American Robin (Turdus migratorius) male preening. Rocky Mountain National Park, Colorado, USA. June. (This image may be licensed either as rights managed or royalty free.)

Edwin Giesbers / RF- Indian eagle owl (Bubo bengalensis) head portrait, captive, from India. (This image may be licensed either as rights managed or royalty free.)

Rolf Nussbaumer / RF- Northern Cardinal (Cardinalis cardinalis) male perched on branch of flowering Eastern Redbud (Cercis canadensis). Dinero, Lake Corpus Christi, South Texas, USA. (This image may be licensed either...

Edwin Giesbers / RF- Two White Stork (Ciconia ciconia). The Netherlands, April. (This image may be licensed either as rights managed or royalty free.)

Staffan Widstrand / RF- Lanner falcon (Falco biarmicus), head portrait of captive falconry bird, Dubai, United Arab Emirates. (This image may be licensed either as rights managed or royalty free.)

Edwin Giesbers / RF- Two Eastern / Great white pelicans (Pelecanus onocrotalus) captive. (This image may be licensed either as rights managed or royalty free.)

Edwin Giesbers / RF- Toco toucan (Ramphastos toco) head close-up, captive. (This image may be licensed either as rights managed or royalty free.)

Rolf Nussbaumer / RF- Northern cardinal (Cardinalis cardinalis) male perched in ice covered bush. Dinero, Lake Corpus Christi, South Texas, USA. (This image may be licensed either as rights managed or royalty free.)

Wild Wonders of Europe / Widstrand / RF- Eastern white pelicans (Pelecanus onocrotalus) taking off from water, Danube delta rewilding area, Romania. May. (This image may be licensed either as rights managed or royalty free.)

Wild Wonders of Europe / Widstrand / RF- European bee eater (Merops apiaster) pair at nest hole, Danube delta rewilding area, Romania, June. (This image may be licensed either as rights managed or royalty free.)

Denis-Huot / RF- Lesser flamingo (Phoeniconaias minor) flock, Bogoria Game Reserve, Kenya (This image may be licensed either as rights managed or royalty free.)

Denis-Huot / RF- Village weaver (Ploceus cucullatus) male building nest, Masai-Mara Game Reserve, Kenya (This image may be licensed either as rights managed or royalty free.)

Staffan Widstrand / RF- King eider duck (Somateria spectabilis) male, Batsfjord village harbour, Varanger Peninsula, Norway. March. (This image may be licensed either as rights managed or royalty free.)

Alex Hyde / RF - Close up of feathers of a Scarlet Macaw (Ara macao) Osa Peninsula, Costa Rica. (This image may be licensed either as rights managed or royalty free.)

Edwin Giesbers / RF- Great Green Macaw (Ara ambiguus) portrait, El Manantial Macaw Sanctuary, Costa Rica. Captive. (This image may be licensed either as rights managed or royalty free.)

David Tipling / RF - Robin (Erithacus rubecula) singing in spring. Norfolk, England, UK. (This image may be licensed either as rights managed or royalty free.)

David Tipling / RF - Nightingale (Luscinia megarhynchos) in song, silhouetted, Camargue, Provence, France. May. (This image may be licensed either as rights managed or royalty free.)

David Tipling / RF - Grey heron (Ardea cinerea) in flight. Camargue, Provence, France. May. (This image may be licensed either as rights managed or royalty free.)

David Tipling / RF - Black-browed albatross (Thalassarche melanophris) in flight, South Atlantic, South Georgia. January. (This image may be licensed either as rights managed or royalty free.)

David Tipling / RF - Shy albatross (Thalassarche cauta) running along surface, taking off into flight, Kaikoura, Southern Ocean, New Zealand. November. (This image may be licensed either as rights managed or royalty...

David Tipling / RF - King penguin (Aptenodytes patagonicus) colony. Salisbury Plain, South Georgia. January. (This image may be licensed either as rights managed or royalty free.)

David Tipling / RF - Brown skua (Stercorarius antarcticus) calling and stretching wings. Salisbury Plain, South Georgia. January. (This image may be licensed either as rights managed or royalty free.)

David Tipling / RF - King penguin (Aptenodytes patagonicus) in surf. Salisbury Plain, South Georgia. January. (This image may be licensed either as rights managed or royalty free.)

David Tipling / RF - Wandering albatross (Diomedea exulans) head portrait looking up. Albatross Island, South Georgia. January. (This image may be licensed either as rights managed or royalty free.)

David Tipling / RF - Grey-headed albatross (Thalassarche chrysostoma) adult brooding chick in colony at Elsehul, South Georgia. January. (This image may be licensed either as rights managed or royalty free.)

David Tipling / RF - Head portrait of two King penguins (Aptenodytes patagonicus). Gold Harbour, South Georgia. January 2015. (This image may be licensed either as rights managed or royalty free.)

Mike Wilkes / RF- Grey partridge portrait in snow (Perdix perdix), UK. (This image may be licensed either as rights managed or royalty free.)

Rolf Nussbaumer / RF- Barn swallow juvenile perched (Hirundo rustica). Texas, USA. (This image may be licensed either as rights managed or royalty free.)

Lynn M Stone / RF - American oystercatcher (Haematopus palliatus) probing sand for invertebrates at low tide. Tampa Bay, St. Petersburg, Florida, USA. March. (This image may be licensed either as rights managed or r...

George McCarthy / RF- Tawny owl with moon behind (Strix aluco), UK. (This image may be licensed either as rights managed or royalty free.)

Nick Garbutt / RF - Red-and-green macaws (Ara chloropterus) two with one taking off, Buraco das Araras (Sinkhole of the Macaws), Jardim, Mato Grosso do Sul, Brazil. September. (This image may be licensed either as...

Nick Garbutt / RF - Malachite sunbird (Nectarinia famosa) male feeding on Aloe flower. Ndutu area, Ngorongoro Conservation Area NCA / Serengeti National Park. April. (This image may be licensed either as rights man...