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NCC Magazine: Fall 2019

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PROJECT<br />

UPDATES<br />

1<br />

Listening for bat signals<br />

SASKATCHEWAN<br />

2<br />

1<br />

THANK YOU!<br />

Your support has made these<br />

projects possible. Learn more at<br />

natureconservancy.ca/where-we-work.<br />

Listening for bats in central Saskatchewan.<br />

3<br />

Little brown myotis and northern myotis bats are both listed as endangered<br />

in Canada due to devastating population declines in eastern Canada as<br />

a result of white-nose syndrome, an introduced fungal disease.<br />

The fungus is moving west, but it has not yet been documented in Saskatchewan.<br />

As a result, there is an urgent need to determine the population status of<br />

myotis bats in Saskatchewan, as well as to determine what type of habitats they<br />

are using for different parts of their life cycle.<br />

Through acoustic surveys, the Nature Conservancy of Canada’s (<strong>NCC</strong>’s) Saskatchewan<br />

Region has been working to develop a better understanding of what bat<br />

species are found on our properties — by listening for their calls. Using an ultrasonic<br />

recording device in areas likely to be used by bats (such as waterbodies and forest<br />

trails) <strong>NCC</strong> staff record the bats’ calls as they fly around and forage for insects.<br />

The calls of each species are unique. By reviewing sonograms of the bats’ calls<br />

recorded on each property, we can determine which species are present and how<br />

active they are. To date, we have surveyed eight properties across the province<br />

and documented all eight bat species known to occur in Saskatchewan, including<br />

endangered little brown myotis and northern myotis.<br />

In summer 2018, we initiated a project to identify where little brown and northern<br />

myotis were using habitat in the aspen and mixed-wood forests of central Saskatchewan.<br />

Both species have been confirmed in the area; however, which areas<br />

and habitat types they are actually using and for what purpose (such as for day<br />

roosting or as a maternity colony) remains unclear. After catching bats with mist<br />

nets, we then attach radio transmitters to them. Bats with transmitters are tracked<br />

back to their roosting areas, which can then be identified.<br />

Both little brown myotis and northern myotis use tree cavities for roost sites,<br />

so the trees being used can be compared to others on the landscape to identify<br />

which trees are used by myotis bats. This information can help <strong>NCC</strong> tailor our<br />

management plans in the areas where these species occur to help with the<br />

species’ protection and recovery.<br />

You can also help by joining Neighbourhood Bat Watch (batwatch.ca), which<br />

aims to document and monitor bat colonies across Canada. The data collected<br />

allows scientists to track bat populations and distribution, and determine if the<br />

populations are stable or growing, or if they are in need of conservation action.<br />

Determining the age of the bat. Adult bats have a fused joint in their wing, while it is absent in<br />

juveniles. Shining a light from behind illuminates the joint and helps distinguish this feature.<br />

SARAH LUDLOW.<br />

14 FALL <strong>2019</strong> natureconservancy.ca

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