Lasionycteris noctivagans Le Conte 1831

D, K D., L, A M., M, B, B, R J. & A, L K., 2012, N C R 14 B S B S S T D S H S, Occasional Papers of the Museum 315, pp. 1-16 : 8

Lasionycteris noctivagans Le Conte 1831

Silver-haired Bat

Like Lasiurus , the primary habitat of the silver-haired bat consists of forested areas. However, this medium sized bat prefers hollowed-out tree cavities or loose bark as its daytime retreat instead of hanging from elevated limbs as is traditional with tree bats ( Schmidly 2004). Among the many chiroptera species found in Texas, L. noctivagans is one of the most broadly but intermittently distributed. Its pattern of dispersal has been attributed to fall and spring migrations. Collection records also suggest that the species is typically absent in Texas during summer months ( Ammerman et al. 2012). The recent collection of four male specimens in May and June suggest that sexual segregation in the summer could result in males residing as far south as Texas ( Ammerman 2005). This species had been recorded in every region in Texas except for East Central Texas Plains, Blackland Prairies, Cross Timbers, and the Southern Texas Plains ( Ammerman et al. 2012). In this report we document the occurrence of L. noctivagans in the following counties: Bailey, Collin, Dallas, Midland, Parmer, Potter, Swisher, Travis, and Williamson.

Bailey County.—A female (TTU 113513, TK

171125) was received on 29 September 2009.

Collin County.—A L. noctivagans specimen

(TTU 113573, TK 171185) was received on 22 September 2006. Collin County is located within the Texas Blackland Prairies , an ecoregion previously not recorded for the species .

Dallas County.— A female ( TTU 113494 , TK 171106) was received on 10 October 2009. Dallas County, like Collin County , is located within the Blackland Prairies .

Midland County.— A male ( TTU 113597 , TK 171209) was received on 23 October 2007 . A female specimen ( TTU 113605 , TK 171217) was received on 29 October 2008 .

Parmer County.—A male (TTU 114607, TK

173107) was received on 13 October 2010.

Potter County.— A TDH record was documented previously by Schmidly (1991). Due to the lack of a voucher specimen, however, we consider the following specimens a new county record. The first specimen received was a male L. noctivagans ( TTU 113582 , TK 171194) on 12 October 2007 . A second male ( TTU 113552 , TK 171164) was received on 2 November 2008 .

Swisher County.—An adult female (TTU 113549,

TK 171161) was received on 13 May 2008.

Travis County.— An adult male ( TTU 113394 , TK 171006) was received on 19 November 2008. Travis County is located within the Edwards Plateau and the Blackland Prairies ecoregions .

Williamson County.— A male ( TTU 113415 , TK 171027) was received on 6 November 2007. Wil- liamson County is within three ecological regions: the Cross Timbers, the Blackland Prairies, and the Edwards Plateau. Both the Cross Timbers and Blackland Prairies regions previously lack documentation of this species. The exact ecoregion for the specimen cannot be determined due to the lack of a specific capture locality .