Protecting birdfeeders from squirrels for cognitive testing in the wild.

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

Female Dendropsophus ebraccatus in Costa Rica

Moon over McPherson

Calling male Hyla chrysoscelis

Mating pair of Hypsiboas rufitelus at La Selva, Costa Rica

Common frog spawn in County Cork, Ireland

An amazing glass frog in Costa Rica

Grasshopper collection site in Germany

Studying cognition in wild songbirds in the famous Wytham Woods

Mating cricket frogs, Stillwater, OK

Water snake at McPherson pond

Bullfrog in Missouri

Heavy bullfrog, McPherson Pond

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

Leptodactylus pentadactylus, the smokey jungle frog

Red eyed treefrogs, Agallychnis callidryas, in Costa Rica

Deer skeleton, McPherson Pond

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