My brother in law works for Cascadia Research and is one of the local bat experts. He actually found the nursery colony under a pier at Woodward Bay in Olympia. He provided the bat detector. Who knows, it may even end up in the Oroville area. It was interesting that a pair of peregrine falcons made a nest in a tree - which is unsual - by the colony, and they would hunt them at dusk when the females headed out for the night foraging. Too bad for the pups when mom didn't come back.