Some years, during the summer months, the Colorado Front Range is subjected to an invasion of Miller Moths. They are small, only an inch in size, and harmless. But they can appear by the millions and have a way of gaining entry through even the smallest opening. The only relief is a bright light over a pail of water or, at last resort, the shop vac. When I was a kid, we had a cat who just loved 'em as a delicacy. He'd go insane, even by cat standards, climbing curtains and window screens to score another fix for his addiction.

Birds love'em too. And I have noted that during one of these invasions, the swallows like to hang out at intersections to partake in the feast. Perhaps the asphalt creates favorable thermals, or the stopping and starting cars shake the moths out of the various hiding holes of the vehicles, or the cars are hitting the moths and the wounded ones are easier to catch. The swallows come very close to the cars and it is most entertaining to watch. But they are clearly there for the free eats.