Observations of Long-legged Myotis and Long-eared Myotis in NNPR are significant given the range extension of approximately 300 km north for each of these species.
Although NNPR is currently north of where Little Brown Myotis are predicted to hibernate (Humphries and others 2002), thousands of hibernating Little Brown Myotis were recently found near Fort Smith (Lausen 2011; Wilson and others 2014).
Abundant trees and rocky habitats, together with riparian foraging habitat make NNPR ideal for the species of bats we observed (tree-cavity roosting, foliage roosting, rock-crevice roosting, cave roosting, solitary, colonial).
There are unconfirmed visual and acoustic records of Big Brown Bats (Eptesicus fuscus) from NNPR.
Confirmed occurrences for Hoary Bat come from acoustic recordings made at 10 locations in NNPR, Fort Simpson, Yellowknife, and near Fort Smith (Fig.
There are unconfirmed acoustic and visual records of Eastern Red Bat (Lasiurus borealis) in NNPR (Fig.
Reproductive female Fittle Brown Myotis were captured in the Western Mountains in NNPR (Lausen and others 2014), in the Central Plains around Kakisa, and in the Fort Smith area (Reimer 2013; JP Reimer, unpubl.
Bats have been observed at caves in NNPR (Fenton and others 1973) but the caves have not been surveyed in winter.
The records from NNPR are the northernmost in North America for both Long-legged Myotis (61.
However, multiple confirmed records from the NT (acoustic recordings from mid-June to late September) suggest that the Hoary Bat occurs regularly in the NT in summer, at least as far north as NNPR, Fort Simpson, and Yellowknife.
Occurrence of the Eastern Red Bat in NT has not been confirmed, but unconfirmed records from NNPR (Lausen and others 2014) and WBNP, Alberta (Lausen 2011; Reimer and others 2014) suggest that the Eastern Red Bat may occur in NT where suitable habitat can be found (such as relatively large deciduous trees for day roosting and open forest for foraging; Jung and others 1999; Hutchinson and Lacki 2000; Elmore and others 2005).