Hoary Bat - Lasiurus cinereus
Hoary Bat - Lasiurus cinereus
General Description
Dorsum yellowish brown to mahogany brown, or mixed dark brownish and grayish, strongly frosted with white; venter whitish on belly, pale brown on chest, yellowish on throat; entire upper surface of interfemoral membrane is heavily furred; ears rimmed with black; length of head and body about 85 mm; adult total length 120-146 mm; forearm 46-55 mm; mass 25-35 g; greatest length of skull 17.0-18.7 mm; maxillary toothrow 5.3-6.5 mm; skull robust, rostrum broad and short, zygomatic arches widespread (Hall 1981, Shump and Shunp 1982, Ingles 1965).
Diagnostic Characteristics
Larger than l. borealis and l. seminolus, in which adult total length is less than 120 mm. upper surface of interfemoral membrane is furred to the tip (only the basal half is furred in l. intermedius and l. ega, both of which have 30 teeth (32 in l. cinereus) and are pale yellowish brown without white frosting).
Distribution
Montana Range
Migration
LASIURUS CINEREUS is migratory and only a summer resident of Montana.
Habitat
During the summer, LASIURUS CINEREUS occupies forested areas. It is possible that this bat is located throughout the state during migration.
Food Habits
Stomach contents analysis of 7 individuals captured in Carter County revealed Lepidoptera, Hemiptera, Homoptera, Neuroptera(Myremeleontidae and Hemerobiidae), and Diptera(Anthomyiidae, Calliphoridae, and Tipulidae).
Ecology
No available information
Reproductive Characteristics
No available information
Citations & Sources