Lasionycteris noctivagans 
139 
house. Before they were exposed, the bats vocalized when the card- 
board was lifted, but otherwise they were lethargic and moved 
slowly. They roosted close to each other, but were not touching. 
The temperature behind the cardboard where the bats were 
roosting was 6 C at 1615 EST. One of the three bats found on 25 
January weighed 10.6 g (a female), the other two (one male and 
one female) each weighed 11.1 g. The two I received from Shimmel 
on 10 January were both females. Their masses on 26 January 
were 10.6 and 10.0 g. Nearby (approximately 0.75 km) another 
abandoned, dilapidated house also had cardboard nailed to the walls. 
I checked behind the cardboard and found a single male L. noctivagans, 
weighing 10.6 g. Both houses were open and offered little protec- 
tion from the elements. In fact, the room in the second site where 
I found the L. noctivagans had only two intact walls. Both houses 
were located at the edges of mature, second-growth oak forest. The 
communal winter roost that I observed appears to be the first con- 
firmed report of more than two L. noctivagans using the same roost. 
LITERATURE CITED 
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sity Press of Kentucky, Lexington. 
Brimley, C. S. 1897. An incomplete list of the mammals of Bertie 
County, North Carolina. American Naturalist 31:237-239. 
Frum, W. G. 1953. Silver-haired bat, Lasionycteris noctivagans, in West 
Virginia. Journal of Mammalogy 34:499-500. 
Kunz, T. H. 1982. Lasionycteris noctivagans. Mammalian Species, 
172:1-5. 
Lee, D. S., J. B. Funderburg, Jr., and M. K. Clark. 1982. A distribu- 
tional survey of North Carolina mammals. Occasional Papers of the 
North Carolina Biological Survey. 
Merriam, C. H. 1884 a. The mammals of the Adirondack region, north- 
eastern New York. Privately published, New York. 
Merriam, C. H. 18846. The vertebrates of the Adirondack region, north- 
eastern New York. (Mammalia, concluded.) Transactions of the Linnaen 
Society of New York. 2:90-96. 
Novakowski, N. S. 1956. Additional records of bats in Saskatchewan. 
Canadian Field-Naturalist 70:142. 
Pearson, E. W. 1962. Bats hibernating in silica mines in southern 
Illinois. Journal of Mammalogy 43:27-33. 
Accepted 6 April 1993 
