there are some flying animals with white tips on thier wings at my pool at night. are they bats or birds? AZ.?

Question

i live in north western arizona, and the flyers come out at sunset, and are gone by 10 pm, mountain time. the white is on the underside of their wings.

Answer 1

Could be nighthawks, swifts, or maybe swallows. My bet would be common nighthawk, which has a white patch on the wing edge. See link.

Answer 2

It's the new Minuteman Airforce doing evening reconissance. Actually, it appears to be bats. Birds usually call it a day at sunset and stop singing. If you have a ultrasonic recorder which can provide a trace that can be played back at a lower pitch, you might try to record them.