Mating pair of Hypsiboas rufitelus at La Selva, Costa Rica

Toad explosion, McPherson Pond

Metamorphosis

Red eyed treefrogs, Agallychnis callidryas, in Costa Rica

Female Dendropsophus ebraccatus in Costa Rica

Bullfrog in Missouri

Mating cricket frogs, Stillwater, OK

Grasshopper collection site in Germany

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

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

Heavy bullfrog, McPherson Pond

Common frog spawn in County Cork, Ireland

Leptodactylus pentadactylus, the smokey jungle frog

Killarney National Park, field site for songbird cognition studies

Studying cognition in wild songbirds in the famous Wytham Woods

An amazing glass frog in Costa Rica

Protecting birdfeeders from squirrels for cognitive testing in the wild.

Calling male Hyla chrysoscelis

Cruziohyla calcarifer at La Selva, Costa Rica

Deer skeleton, McPherson Pond

Moth, Stillwater, OK

Water snake at McPherson pond

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