That’s not what I found. Instead, urban assemblages seemed more dominated by one bat species—similar to the results of studies elsewhere, except that in Calgary, the urban denizen was the little brown bat (Myotis lucifugus), whereas in other North American cities, it’s the big brown bat (Eptesicus fuscus).
Now, when one species becomes more dominant in a city like this, urban ecologists may classify it as an urban exploiter. Urban exploiters tend to rely so heavily on human resources and to benefit so much from urbanisation that their urban populations explode. But this doesn’t seem true for little brown bats in Calgary. Yes, they’re more abundant, but the insects they eat are not, and so urbanisation might lead to greater competition for food and, ultimately, reduced fitness. Of course, many other factors are at play, but clearly, little brown bats aren’t urban exploiters in the Prairies.