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Bat activity and richness in beetle-killed forests in southern British Columbia

Large ares of forest in western North America are characterized by dead trees caused by outbreaks of bark beetles in the past decades. Uncertain of how patches of dead trees may effect bat populations, the researchers conducted surveys of bat species richness in forests with low and high levels of tree deaths. They detected 6 species of bats, including little brown bats that are listed as endangered by the federal government. They determined that beetle-killed forest do not effect bat presence nor activity and also do not provide increased habitat use for bats.

Population genetics reveal Myotis keenii (Keen's myotis) and Myotis evotis (long-eared myotis) to be a single species

An alternative minimally invasive technique for genetic sampling of bats- Wing swabs yield species identification

Bat species are traditionally identified morphologically, but in some cases, species can be difficult to differentiate. Wing punches (biopsies) of wing or tail membranes are commonly used to collect tissue for DNA analysis, but less invasive techniques are preferable. As such, DNA acquired using buccal and wing swabs or from fecal pellets are increasingly being employed. This study compared a dry swabbing technique with the wing biopsy technique for DNA collection. They compared species identification between tissue biopsies and wing swabs collected from bats in Alberta and British Columbia, Canada, between April and November, 2014, and September and October 2015. Species identification was achieved with varying methods of field collection and lab processing. DNA was extracted, sequenced, and compared with reference sequences and field identifications.

First Acoustic Records of the Brazilian Free-Tailed Bat (Tadarida brasiliensis) In British Columbia

This study reports the1st evidence of the Brazilian Free-tailed Bat (Tadarida brasiliensis) in Canada. The historic distribution records of this species was in the Pacific Northwest region of North America including southern Oregon and southern Idaho, but not British Columbia. During 2014–2016 they conducted bat acoustic surveys in Canada on Salt Spring Island, British Columbia, sampling 1342 detector-nights. They recorded multiple bat-call sequences during 2016 showing pulse and sequence attributes consistent with those of the Brazilian Free-tailed Bat. The Brazilian Free-tailed Bat is a fast long-distance flyer, and acoustic surveys outside of its historic range may benefit from surveillance for this species.

A plan for the North American Bat Monitoring Program (NABat)

The purpose of the North American Bat Monitoring Program (NABat) is to create a continent-wide program to monitor bats at local to rangewide scales that will provide reliable data to promote effective conservation decision making and the long-term viability of bat populations across the continent. This is an international, multiagency program. Four approaches will be used to gather monitoring data to assess changes in bat distributions and abundances: winter hibernaculum counts, maternity colony counts, mobile acoustic surveys along road transects, and acoustic surveys at stationary points. These monitoring approaches are described along with methods for identifying species recorded by acoustic detectors. Other chapters describe the sampling design, the database management system (Bat Population Database), and statistical approaches that can be used to analyze data collected through this program.

Environmental correlates and energetics of winter flight by bats in Southern Alberta, Canada

Winter activity of bats is very common but the extent to which environmental factors affect flight activity is still poorly understood. This study recorded echolocation calls of bats in Dinosaur Provincial Park, Alberta, Canada to determine the influence of environmental factors on bat winter activity.
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