DIFFERENCES IN THE DIETS OF JUVENILE AND ADULT HOARY BATS, LASIURUS-CINEREUS

The diets of hoary bats (Lasiurus cinereus) within the first 2 weeks post-fledging were studied by means of fecal analysis. Results were compared to the diet of adult hoary bats within the same area. Juvenile bats consumed significantly fewer Odonata than did adults. Chironomidae (Diptera) were the major contributor to the diet of juveniles during the 1st week of flight, but were a negligible component in the diet of older juveniles or adults. Due to a lack of experience, juveniles likely have poor handling skills of larger insects. However, lower wing loading and greater maneuverability may make small prey more available to juveniles.