A single colony of 150 bats will consume millions of insects of each summer. Even better, a single Small Brown Bat will consume up to 1,000 mosquitoes a night. Built to the same rugged no-frills Amador Owl standard for a long life. OSB material provides natural batholds. Extra exterior glue and screws add strength and help seal chamber without sharp points. Quality exterior dark latex house paint protects wood and enhance solar warming. Side ventilation holes prevent overheating. "Attic" provides horizontal roosting surfaces preferred by some species. Made in the USA.