I have never noticed the "swallows" ( we call them chimney swifts around here) flying around much during the day when the flies are out. They mostly fly at dusk and eat a TON of skeeters. On summer evenings we can sit out at the barn and watch them fly between our barn and the pond eating the mosquitos. Then just about dark they fly back to this old factory or mill ruins next door where they nest and roost. About the time they all get in, abut 10 minutes later the bats come out of the top. We can see them working on the skeeters when they fly around the security lights and if the moon is out, Between the bats and the chimney swifts, we are surprisingly just about mosquito free. For fly control I keep some traps and strips in and around the barn. And I put a handful of corn in the feed for the horses every night. This causes the chickens and guineas to scratch around and spread out the manure, so it dries out pretty quick, They also eat any maggots that are in the manure piles. This place is only about 13 acres, with 4-6 horses, ,and sometimes a few roping steers. @kenny thomas , are the chimney swifts you have flying at all parts of the day?
