When I was putting up my bat houses I searched for information about it. It seems someone did a "study" where they put bats in a room full of mosquitoes and counted how many they could catch per minute. From that was extrapolated the tremendous number that it would be possible for them to catch in a night of feeding. But real world observations have shown that reality is quite different - similar to the hype on the Martins.
We traveled to Whitehorse this summer, camped and golfed all about Alberta and have been outside in the yard every single day we were home. I applied mosquito spray twice this entire year, and once was really unnecessary. I don't think that the birds/bats etc. had much to do with it.
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