Matthew Maran / Red fox (Vulpes vulpes) dog interacting with a vixen in an urban garden. North London, UK. July.

Ernie Janes / Cougar (Puma concolor) portrait, captive, occurs in the Americas. With digitally added leaves.

Edwin Giesbers / Lemon-yellow tree frog (Hyla savignyi) climbing up grass stem. Cyprus. April.

Edwin Giesbers / Lemon-yellow tree frog (Hyla savignyi) Cyprus. April.

Morley Read / Leaf frog (Agalychnis hulli) blinking its eyes and turning around, Orellana Province, Ecuador. (non-ex)

Steven David Miller / An Orange lacewing butterfly (Cethosia penthesilea), Cairns Botanical Gardens, Queensland, Australia. Captive. August.

Suzi Eszterhas / Colombian red howler monkey (Alouatta seniculus) mother and baby in tree. Northern Colombia.

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus), adult with two week old baby on back. Northern Colombia.

Ernie Janes / Black howler (Alouatta caraya) captive, occurs in South America.

Markus Varesvuo / Pygmy owl (Glaucidium passerinum) perched in lichen covered tree. Helsinki, Finland. February.

Markus Varesvuo / Hazel grouse (Tetrastes bonasia) standing in snow at forest edge. Helsinki, Finland. February.

Markus Varesvuo / Blue tit (Parus caeruleus) perched on tree trunk, looking at camera with wing stretched. Haukipudas, Finland. January.