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