Bat population declines are documented for the past several decades for many bat species in North America. Bat conservation goals reflect the objectives of a study of bats at RMA beginning in May and running through August 2004. The study examines species composition, relative abundance, and contaminant levels in bats. This is complementary to a study that was conducted in 1997 and 1998. We will also be installing bat houses and conducting a bat education program, which will contribute to conservation measures.

The survey is for bats primarily in water and tree edge habitat. To capture bats, mist nets (fine-gage nylon nets) are placed where bat activity is likely to be highest. Also, an ultrasonic bat detector is used for acoustic detection. Bat detectors provide a diagnostic sonogram of bat calls that enables us to identify bats to species and determine foraging activity. Finally, because bats are vulnerable to contaminants, they are good indicators of environmental pollution. Levels of dieldrin, DDT, DDE, and mercury in big brown bats are being evaluated.

Last Updated: 3/24/09