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