Heavy bullfrog, McPherson Pond

Common frog spawn in County Cork, Ireland

Female Dendropsophus ebraccatus in Costa Rica

Cruziohyla calcarifer at La Selva, Costa Rica

Territorial response of a male great tit to a speaker broadcasting an intruder song

An amazing glass frog in Costa Rica

Mating cricket frogs, Stillwater, OK

Cantarrana (singing frog) swamp, La Selva, Costa Rica

Metamorphosis

Protecting birdfeeders from squirrels for cognitive testing in the wild.

Toad explosion, McPherson Pond

Moon over McPherson

Calling male Hyla chrysoscelis

Water snake at McPherson pond

Studying cognition in wild songbirds in the famous Wytham Woods

Red eyed treefrogs, Agallychnis callidryas, in Costa Rica

Moth, Stillwater, OK

A blue tit nest, from studies of bird cognition and breeding in County Cork, Ireland

Leptodactylus pentadactylus, the smokey jungle frog

Bullfrog in Missouri

Mating pair of Hypsiboas rufitelus at La Selva, Costa Rica