Bats in Washington: Where to Look and What Signs to Watch For

Are there bats in Washington?

Yes. Washington hosts at least 11 bat species, including the big brown bat, little brown bat, and California myotis. They are found in every part of the state, from the Olympic Peninsula to the interior basalt cliffs. Most are insectivores and become active just after sunset.

In Washington, bats sightings usually improve when you slow down and match your first stop to where the animal is most likely in the state. Use the state wildlife hub and the route guide to narrow your first area, then check access, weather, and distance before you settle in. A short walk with one clear viewing plan often beats covering too much ground, especially when habitat changes fast from open edges to brush, wetlands, timber, shoreline, or neighborhood cover.

Where are bats most likely found in Washington?

Bats favor places with nearby water and insect-rich air. Look for them over rivers, lakes, and wetlands. They also roost in caves, under bridges, in hollow trees, and inside abandoned buildings. Popular public spots include the Washington wildlife areas near the Columbia River and forest edges in the Cascade foothills.

What time of day and season is best for spotting bats?

The best time is the hour after sunset, especially between May and August. Bats emerge later in cool weather and earlier on warm evenings. On hot days they may come out before full dark. In winter most bats hibernate, so late spring through early fall is your window.

See our state animal guide for the next step.

What field signs should a beginner look for?

Look for small dark droppings (guano) beneath roosts, stained entry holes, and faint squeaking at dusk. You may also see moth wings piled near a roost or hear fluttering in attics. Bat flight is erratic and twisting, unlike the straight path of swallows. For more details on species, visit our bat animal hub.

How can I see bats without causing disturbance?

Stay at least 30 feet from known roosts. Use a red flashlight to avoid blinding them. Never enter caves during hibernation, and avoid handling bats. Many parks offer evening bat walks. A good starting point is the Washington wildlife guide for accessible sites.