Calling male Hyla chrysoscelis
Cruziohyla calcarifer at La Selva, Costa Rica
Female Dendropsophus ebraccatus in Costa Rica
Killarney National Park, field site for songbird cognition studies
A blue tit nest, from studies of bird cognition and breeding in County Cork, Ireland
Deer skeleton, McPherson Pond
An amazing glass frog in Costa Rica
Protecting birdfeeders from squirrels for cognitive testing in the wild.
Mating pair of Hypsiboas rufitelus at La Selva, Costa Rica
Leptodactylus pentadactylus, the smokey jungle frog
Metamorphosis
Bullfrog in Missouri
Common frog spawn in County Cork, Ireland
Cantarrana (singing frog) swamp, La Selva, Costa Rica
Studying cognition in wild songbirds in the famous Wytham Woods
Water snake at McPherson pond
Heavy bullfrog, McPherson Pond
Red eyed treefrogs, Agallychnis callidryas, in Costa Rica
Mating cricket frogs, Stillwater, OK
Moth, Stillwater, OK
Grasshopper collection site in Germany
Moon over McPherson
Toad explosion, McPherson Pond
Territorial response of a male great tit to a speaker broadcasting an intruder song