Yard Guy wrote
Chas Hurst wrote

In other words, while I can believe that bats can detect, and
eat a lot of flying insects (moths, etc) I simply don't believe
that mosquitoes form any significant portion of their diet.

That's just plain ignorance. Bats eat lots of mosquitoes, and it
doesn't matter what portion of the bats diet mosquitoes make.

A bat that eats one mosquito per night would not it
a good reason to try to attract bats to my back yard.

And you didn't respond to my comment that I question if a mosquito
is large enough to be detectible to the echo-location mechanism that
bats use to locate and consume their flying food items at night.

It clearly must be when its known that bats eat
huge numbers of mosquitos in a single sitting.

And that is trivial to prove by killing the bats and examining their stomach contents.