Bat Species of Oregon:
California myotis (Myotis californicus)*; found throughout the state, excluding the Columbia basin.
Western small-footed myotis (Myotis ciliolabrum); found in the Cascade Mountains
Long-eared myotis (Myotis evotis)*; found throughout the state
Little brown myotis (Myotis licifugus)
Fringed myotis (Myotis thysanodes); found in the Coast Range and Wallowas
Long legged myotis (Myotis volans): found Blue Mountain, Coast Range, Cascades, Klamath Mountains
Yuma myotis (Myotis yumanensis)*; found throughout the state
Hoary bat (Lasiurus cinereus)*; found in scattered locations west of the Cascade Mountains and in some montane forest east of the Cascades.
Silver-haired bat (Lasionycteris noctivagans)*; found throughout most of the state, except Columbia Basin.
Canyon bat (Parastrellus hesperus); found in eastern Oregon.
Big brown bat (Eptesicus fuscus)*; found throughout the state
Spotted bat (Euderma maculatum); found in eastern Oregon
Townsend's big-eared bat (Corynorhinus townsendii)*; found throughout most of the state.
Pallid bat (Antrozous pallidus); found in arid areas of southwestern and and eastern Oregon.
Brazilian free-tailed bat (Tadarida brasiliensis); found in southern Oregon
* Bats found in the Willamette Valley
Bat Conservation International (Very best source on everything bats): batcon.org
Oregon Department of Fish and Wildlife: dfw.state.or.us, (then navigate to bats)