Diets of Juvenile, Yearling, and Adult Big Brown Bats (Eptesicus fuscus) in Southeastern Alberta

摘要: We examined dietary characteristics of juvenile, yearling, and adult big brown bats ( Eptesicus fuscus ) at two maternity colonies in southeastern Alberta, Canada. The diet E. included nine orders insects 1994 1995: Coleoptera, Hemiptera, Lepidoptera, Diptera, Trichoptera, Neuroptera, Hymenoptera, Ephemeroptera, Homoptera. was dominated by Coleoptera. Juvenile consumed significantly fewer Coleoptera more Hemiptera than did adults 1994, but diets not differ between age classes 1995. Juveniles a greater range softer items their adults. Yearlings (bats that have survived first winter) diet.