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Mary K. Clark 
sertion that this was the most common bat in the area. There is 
one summer record of a family of silver-haired bats found in an 
abandoned woodpecker hole (Novakowski 1956). 
Several sightings of pairs of L. noctivagans roosting together 
in winter have been reported. Notes by N. B. McCulloch, in the 
files at the N.C. State Museum of Natural Sciences, describe a 
male and female L. noctivagans found together in a house in Ra- 
leigh, North Carolina (Wake County), on 11 December 1951. Brimley 
(1897) wrote that two were taken 26 December 1892 from a hol- 
low tree in Bertie County, North Carolina, but did not note the sex 
of either. Barbour and Davis (1969) also reported finding two L. 
noctivagans , hibernating about 3 feet from each other, in a mine in 
Illinois. No information was provided on the sex of these. While 
conducting- field investigations of rabies in wildlife, Pearson (1962) 
visitied silica mines to sample bats and recorded occasions when 
more than one L. noctivagans was found, but he did not describe 
the roost associations. 
Several sources described multiple L. noctivagans found in a 
single locality, but it is unclear whether any of them were found 
roosting together. Frum (1953) took six L. noctivagans from the 
same sandstone ledge in West Virginia on two different dates in 
March, but no comments on roost associations were made. Brimley 
(1897) reported taking four on 9 July 1891 in Bertie County, North 
Carolina, but there were no comments on whether the bats were 
taken from a roost or whether they were shot while flying. 
On 10 January 1993 I received two silver-haired bats that had 
been obtained by Matt Shimmel (Raleigh, North Carolina) while he 
was looking for old lumber for carpentry projects in Granville County, 
North Carolina. He found the bats behind cardboard that had been 
nailed as insulation to the inside of wooden walls of an abandoned 
house. The bats fell to the floor when the cardboard was lifted, 
and his efforts to get them to hang back on the wall failed. Fear- 
ing the bats would die if left there, Shimmel retrieved them and 
contacted me. He told me there had been several more bats behind 
the cardboard, perhaps as many as eight. 
I kept the two bats in a refrigerator (at a temperature ranging 
from 4 to 5 C), until 25 January 1993, when I visited the house 
in Granville County (about 2.4 km northeast of Grissom) to return 
them to the capture site. At that time I found three other L. noctivagans 
behind the piece of cardboard where I was told the other two had 
been found. They were roosting 1.75-2.0 m above the floor of the 
