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...foraging area (21.5 ha) and spent much time foraging in oldfields. Observations of this, and several untagged bats, lead us to hypothesize these behaviors are normal for hoary bats in Indiana.
Keywords: Hoary bat, Lasiurus cinereus, foraging, Indianapolis International Airport, roosting
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A long-term study of the bat community is being conducted near the developing edge of Indianapolis, Indiana (Sparks et al. 1998; Whitaker et al. 2004). The largest bat in this community is the hoary bat (Lasiurus cinereus), which is infrequently captured during mist-net surveys. Acoustic data from another regional metroplex (Chicago, Illinois), however, suggest hoary bats are more common than netting would indicate (Gehrt Chelsvig 2004). In addition to being large, hoary bats occasionally attack other bats (Bishop 1947; Orr 1950; Bell 1980), and defend territories during inclement weather (Barclay 1986, 1989). As such, hoary bats, even at low densities, may be an important component of the local community.
Detailed data about the nocturnal behavior of hoary bats are limited to studies conducted in British Columbia (Barclay 1986, 1989). No information about foraging and roosting behavior of this species is available in Indiana (Mumford & Whitaker 1982), where the species appears to be in...
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