Puffin with gaping beak showing almost parallel articulation, Wales, United Kingdom, Europe

Puffin with gaping beak showing barbs in roof of beak, Wales, United Kingdom, Europe

Adult Swallow-Tailed Gull, showing breeding season red rimmed eye, a nocturnal equatorial seabird, found almost exclusively in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Clymene dolphin (Stenella clymene) porpoising towards the photographer, showing characteristic black beak markings, Senegal, West Africa, Africa

Toco toucan (ramphastos toco) close,up showing head and beak, captive, brazil.

Toco toucan (ramphastos toco) close,up of head showing blue eyering, captive, brazil.

Gervais Beaked Whale, Mesoplodon europaeus, adult surfacing, showing beak, extremely rare unusual image, Azores, Atlantic Ocean

Bewick's Swan (Cygnus columbianus) close-up of head showing yellow and black beak, Slimbridge, UK

Red,breasted toucan (ramphastos dicolorus) close,up showing head and beak, captive, brazil.

Rook (corvus frugilegus) close-up showing head and beak, oxfordshire, uk

Close-up details showing beak from a dissection of a Humbolt Squid (Dosidicus gigas) in the Gulf of California (Sea of Cortez), Mexico.

Close-up details showing beak from a dissection of a Humbolt Squid (Dosidicus gigas) in the Gulf of California (Sea of Cortez), Mexico.

Spinner dolphins. (Stenella longirostris). Two spinner dolphins showing the long narrow beak and dark eye stripe. Caribbean.

Spinner dolphins(stenella longirostris) . Two spinner dolphins showing the dark beak and eye markings. Eastern Caribbean

Spotted dolphin (Stenella attenuata). A spotted dolphin showing the typicaly pale beak. Caribbean. (RR)

Close-up of King Penguin's (Aptenodytes patagonicus) head looking up, showing detail of coloured plumage, Volunteer Point, Falkland Islands