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