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