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