Grottegeologi og –vern => White nose syndrome => Emne startet av: Rolf pĺ 31.01.2015 21:38

Tittel: Jewel Cave Winter Bat Survey Finds Near Record Numbers
Skrevet av: Rolf31.01.2015 21:38
"With the help of the Black Hills National Forest staff and experienced volunteers, National Park Service staff conducted the annual bat count at Jewel Cave National Monument this past Wednesday, January 28.
Through their efforts, 1,437 bats were surveyed hibernating just inside historic entrance of the cave, one of the highest recorded counts since 2005, which numbered 1555.

The tally included three genera of bats, with the most numerous species recorded being the Townsend’s big-eared bat (Corynorhinus townsendii) numbering 904. Next up were various Myotis species totaling 531, and finally 2 big brown bats (Eptesicus fuscus).

Jewel Cave supports one of the largest known hibernating colonies of Townsend’s big-eared bats in the world. With the historic entrance closed to the public in the winter months, Jewel Cave provides a safe haven during the winter months, allowing uninterrupted hibernation from predators and human disturbance."