Bats consume numerous mosquitoes each night.
You know, those birds that fly, wheel about on a dime, and fly at or less than tree level at dusk.
In the wild, they will roost under bridges, roof gables, and over-hangs; occasionally they are found in attics amid shrieks of horror.
I have read of bats consuming as many as 3,200 mosquitoes per night flight.
Bats act and live socially, and are not prone to live isolated; they thrive as a "community", and work and feed together.
Local bird seed and wildlife supply houses offer "Bat houses" for sale, to encourage the populations.
Since bats operate at dusk and throughout the evening, you might not even see them,
but you will notice the benefit of their presence with fewer mosquito annoyances.
I probably ought to encourage bats to hang around here. I bet the bat houses have to be up high though...