9 Types of Bats in Oregon
Yes, Oregon is home to at least 15 distinct species of bats. These nocturnal mammals play a vital role in the state's ecosystem by consuming vast quantities of insects each night. You are most likely to spot them at dusk near forests, rivers, or caves, where they emerge to feed. To start your search, focus on the Willamette Valley or the Columbia River Gorge, where habitat and water sources are abundant. You can explore more about the state's wildlife on the [Oregon wildlife hub](/wildlife/oregon) or find specific identification tips in the [bat guide](/wildlife/oregon/bat). For detailed behavior and species notes, our [animal facts page](/animals/bat) is an excellent resource to review before your outing.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 2, 2026.
- 5
- species recorded
- August, July, September
- peak months
Verified species, source iNaturalist
9 types of bats recorded in Oregon
9 bat species have a verified observation record in Oregon across bats (order Chiroptera), each with at least 10 confirmed sightings. The full list, ranked by how often each is recorded, is below.
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Plus 5 more recorded only rarely (fewer than 10 verified sightings). Counts from verified iNaturalist observations. Photos by iNaturalist observers, reused under the licence each observer chose.
Real sighting data, source iNaturalist
1,011 verified observations on iNaturalist of bat have been recorded in Oregon, most often in August, July, September.
Yes, Oregon is home to at least 15 distinct species of bats. These nocturnal mammals play a vital role in the state's ecosystem by consuming vast quantities of insects each night. You are most likely to spot them at dusk near forests, rivers, or caves, where they emerge to feed. To start your search, focus on the Willamette Valley or the Columbia River Gorge, where habitat and water sources are abundant. You can explore more about the state's wildlife on theOregon wildlife hubor find specific identification tips in thebat guide. For detailed behavior and species notes, ouranimal facts pageis an excellent resource to review before your outing.
What types of bats live in Oregon?
The most widespread are the **little brown bat** (*Myotis lucifugus*) and **big brown bat** (*Eptesicus fuscus*). Other species include the **Mexican free-tailed bat**, **hoary bat**, **silver-haired bat**, and the **California myotis**. Each has distinct features: the hoary bat is large with frosted fur, while the free-tailed bat has a tail that extends beyond its tail membrane. For a broader overview, check ourbat identification page.
In Oregon, bats sightings usually improve when you slow down and match your first stop to the most useful ID markers and likely lookalikes. Use thestate wildlife huband theroute guideto 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 in Oregon are bats most often seen?
Bats favor the western forests, the Willamette Valley, and the Columbia River Gorge. They roost in old trees, caves, and under bridges. In central and eastern Oregon, look near water sources like the Deschutes River. Summer evenings near ponds or marshes are reliable spots. Learn more aboutOregon wildlife hotspots.
When is the best time to spot bats in Oregon?
Late spring through early fall (May to September) is prime time. Bats emerge just after sunset, with the first 30 minutes being the most active. On warm nights, you may see them feeding on insects. Winter is off limits for most species because they hibernate. Use a bat detector around dusk for better odds.
How can you identify a bat in Oregon?
Start with size: the little brown bat is only 3 to 4 inches long, while the big brown bat is up to 5 inches. Check ear shape: the big brown has a blunt tragus, the little brown has a pointed one. Flight style also helps: fast and erratic often means free-tailed, while slow flutter suggests a myotis. TheOregon bat identification guidecovers these marks in more detail.
What are some lookalikes for Oregon bats?
Birds like swallows and nighthawks are often mistaken for bats at dusk. Swallows have more pointed wings and a swooping, gliding flight; bats flap more continuously. Nighthawks have white wing patches and a bounding flight. Also, large moths can be deceiving. Focus on wing motion and body shape to separate them.
Which Oregon bat species are the most unique?
The Townsend's big eared bat is perhaps Oregon's most striking species, with ears that can reach over an inch in length. These bats are sensitive to disturbance and are often found in caves and abandoned mines. Another unique resident is the pallid bat, which is found in the drier regions of eastern Oregon. Unlike most bats that catch insects in flight, the pallid bat often drops to the ground to hunt crickets, scorpions, and even small lizards.
How do bats survive the Oregon winter?
Most Oregon bats are hibernators, seeking out stable temperatures in caves, mines, or deep rock crevices to survive the cold months. During hibernation, their heart rate and body temperature drop significantly to conserve energy. Some species, like the hoary bat and silver haired bat, may migrate to warmer climates farther south. Because they are so vulnerable during the winter, it is crucial to avoid disturbing known roosting sites from November through March.
What bat-themed gear can help you show your appreciation?
If you want to share your bat interest, we've picked a few items. TheCute Bat Stickeris a fun way to decorate gear. For daily wear, theBat Animal Short-Sleeve T-Shirtoffers a bold design. TheBaby Bat Cartoon T-Shirtmakes a great gift for younger fans. Browse more at ourbat t-shirt collection.
Cute Bat Sticker
A simple vinyl sticker with an adorable bat design. Perfect for laptops or water bottles.Check Price and Availability
Bat Animal Short-Sleeve T-Shirt
A comfortable tee featuring a bat graphic. Good for casual outings.Check Price and Availability
Baby Bat Cartoon T-Shirt
A cute cartoon-style shirt for kids or anyone young at heart.Check Price and Availability
Frequently asked questions about bats in Oregon?
**Are bats common in Oregon?** Yes, they are found throughout the state, though more abundant west of the Cascades.
**What is the largest bat in Oregon?** The hoary bat, with a wingspan up to 16 inches.
**Do bats hibernate in Oregon?** Yes, most species hibernate in caves or mines from November to March.
**Can I attract bats to my yard?** Installing a bat house near a water source can encourage them to roost.
**What should I do if I find a grounded bat?** Do not handle it. Contact a local wildlife rehabilitator, as bats are protected and may carry rabies.
See ourtour planning ideasfor the next step.
Gear and field guides
Frequently asked questions
What types of bats live in Oregon?+
The most widespread are the **little brown bat** (*Myotis lucifugus*) and **big brown bat** (*Eptesicus fuscus*). Other species include the **Mexican free-tailed bat**, **hoary bat**, **silver-haired bat**, and the **California myotis**. Each has distinct features: the hoary bat is large with frosted fur, while the free-tailed bat has a tail that extends beyond its tail membrane. For a broader overview, check ourbat identification page. In Oregon, bats sightings usually improve when you slow down and match your first stop to the most useful ID markers and likely lookalikes. Use thestate wildlife huband theroute guideto 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.
How do you tell bats apart in Oregon?+
The most widespread are the **little brown bat** (*Myotis lucifugus*) and **big brown bat** (*Eptesicus fuscus*). Other species include the **Mexican free-tailed bat**, **hoary bat**, **silver-haired bat**, and the **California myotis**. Each has distinct features: the hoary bat is large with frosted fur, while the free-tailed bat has a tail that extends beyond its tail membrane. For a broader overview, check ourbat identification page. In Oregon, bats sightings usually improve when you slow down and match your first stop to the most useful ID markers and likely lookalikes. Use thestate wildlife huband theroute guideto 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.
Which bat is most common in Oregon?+
The most widespread are the **little brown bat** (*Myotis lucifugus*) and **big brown bat** (*Eptesicus fuscus*). Other species include the **Mexican free-tailed bat**, **hoary bat**, **silver-haired bat**, and the **California myotis**. Each has distinct features: the hoary bat is large with frosted fur, while the free-tailed bat has a tail that extends beyond its tail membrane. For a broader overview, check ourbat identification page. In Oregon, bats sightings usually improve when you slow down and match your first stop to the most useful ID markers and likely lookalikes. Use thestate wildlife huband theroute guideto 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.
Keep exploring
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