New York Natural Heritage Program
Silver-haired Bat
Lasionycteris noctivagans (Le Conte, 1831)
Mammals

New York State Distribution [-]
The distribution of silver-haired bats is unknown. Records of this species in New York during summer are sparse and come from occasional mist-net captures and carcasses found at wind turbines in Steuben, Wyoming, Franklin, Lewis, Jefferson, Clinton, Onondaga, Oswego, Madison and Oneida County counties (Reynolds 2009, NYSDEC and US army unpublished data). Higher numbers of carcasses are found during late-summer migration at wind facilities in most of the aforementioned counties and notably in spring migration at a wind farm in Madison and Oneida County. A historical account also reported that Lewis County held important areas for silver-haired bats, noting that they were particularly abundant at Lyons Falls and at the junction of the Sugar and Black rivers (Merriam 1886). Additionally, recent work in Jefferson and Lewis counties have documented the majority of non-migration records within the state and may suggest that silver-haired bats could be locally common in that area (NYSDEC and US Army, unpublished data).

Global Distribution [-]
Silver-haired bats occur across a broad range that spans a large portion of North America. They range from far southeastern Alaska across most of the middle to southern latitudes in Canada and throughout the United States except for far southern latitudes including Florida and southern California. They also occur into northeastern Mexico and in Bermuda (NatureServe 2013). Silver-haired bats winter in the Pacific Northwest, in some areas of the southwest and midwest, and at middle latitudes of the eastern United States approximately from southern Michigan to Arkansas, Kentucky, and North Carolina (Izor 1979; Cryan 2003). Their distribution has been described as erratic.