Shattil & Rozinski,Shattil & Rozinski / Mule deer (Odocoileus hemionus), with the Denver skyline and Rocky Mountains in the background, Denver, Colorado, USA, November.

Steven David Miller / Rainbow bee-eater (Merops ornatus) resting on branch between foraging flights. Kununurra, Western Australia.

Mike Read / European bee-eater (Merops apiaster) pair mating on a branch one with an insect, Tiszaalpar, Kiskunsag National Park, Hungary, May.

Charlie Summers / Northern carmine bee-eater (Merops nubicus) regurgitating pellet, Selous Game Reserve, Tanzania.

Bruno D'Amicis / Eastern grey plantain-eater (Crinifer zonurus) perched, Lake Tana Biosphere Reserve, Ethiopia

Ashish & Shanthi Chandola / Little green bee eater (Merops orientalis) Yala National Park, Sri Lanka.

Tui De Roy / Tui (Prosthemadera novaeseelandiae) endemic nectar eater, feeding off spring blooming kowhai (Sophora species) blossoms. Tiritiri Matangi Island Open Sanctuary, New Zealand.

Tui De Roy / Tui (Prosthemadera novaeseelandiae) endemic nectar eater feeding on spring flowering kowhai (Sophora species) blossoms. Tiritiri Matangi Island Open Sanctuary, New Zealand.

Tui De Roy / North Island Kokako (Callaeas cinerea wilsoni) endemic plant eater, forest to canopy, threatened by introduced predators, Otorohanga Breeding Center, New Zealand

Tui De Roy / North Island Kokako (Callaeas cinerea wilsoni) endemic plant eater, forest to canopy, threatened by introduced predators, Otorohanga Breeding Center, New Zealand

Tui De Roy / North Island Kokako (Callaeas cinerea wilsoni) endemic plant eater, forest to canopy, threatened by introduced predators, Otorohanga Breeding Center, New Zealand

Tui De Roy / North Island Kokako (Callaeas cinerea wilsoni) threatened endemic species, plant eater, forest floor to canopy, lives in close-bonded pair year-round, Otorohanga Breeding Center, New Zealand