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#           Late-season movement and habitat use by Oregon spotted frogs (Rana pretiosa) in Oregon, USA      

      September 28, 2018    

Many amphibians use multiple habitats across seasons. Information on seasonal habitat use, movement between seasonal habitat types, and habitats that may be particularly valuable is important to conservation and management. We used radio-telemetry to study late-season movement and habitat use by Oregon Spotted Frog (Rana pretiosa) at nine sites from four populations along the Cascade Mountains in Oregon. Movement rates declined with date and were the lowest at the end of tracking in December and January. Frogs across our sites used vegetated shallows in late summer and early fall. In fall, frogs used a range of habitat types, and at several sites moved to distinctive habitats such as springs, interstices in lava rock, and semi-terrestrial beaver channels. Distance between first and last tracking location was <250 m for 84.5% (49/58) of frogs, ranged up to 1145 m, and was greater for frogs in ditch habitats than those not in ditches. Distinctive features like springs or semi-terrestrial retreats can host multiple frogs and may represent particularly valuable wintering habitat for R. pretiosa in some sites in their Oregon range.

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September 28, 2018

####                 Telemetry and habitat data for Oregon spotted frogs (Rana pretiosa) in Oregon, USA              

Forest and Rangeland Ecosystem Science Center

#### Christopher A Pearl

##### Wildlife Biologist

Forest and Rangeland Ecosystem Science Center

christopher_pearl@usgs.gov

541-750-1011

#### Brome McCreary

##### Wildlife Biologist

Forest and Rangeland Ecosystem Science Center

brome_mccreary@usgs.gov

541-750-1012

#### Jennifer Rowe

##### Wildlife Biologist

Forest and Rangeland Ecosystem Science Center

jrowe@usgs.gov

541-750-1017

#### Michael J Adams

##### Supervisory Research Ecologist

Forest and Rangeland Ecosystem Science Center

mjadams@usgs.gov

541-750-0980

## Related Content

September 28, 2018

####                 Telemetry and habitat data for Oregon spotted frogs (Rana pretiosa) in Oregon, USA              

Forest and Rangeland Ecosystem Science Center

#### Christopher A Pearl

##### Wildlife Biologist

Forest and Rangeland Ecosystem Science Center

christopher_pearl@usgs.gov

541-750-1011

#### Brome McCreary

##### Wildlife Biologist

Forest and Rangeland Ecosystem Science Center

brome_mccreary@usgs.gov

541-750-1012

#### Jennifer Rowe

##### Wildlife Biologist

Forest and Rangeland Ecosystem Science Center

jrowe@usgs.gov

541-750-1017

#### Michael J Adams

##### Supervisory Research Ecologist

Forest and Rangeland Ecosystem Science Center

mjadams@usgs.gov

541-750-0980

### Contact

####               Forest and Rangeland Ecosystem Science Center (FRESC) Headquarters          

777 NW 9th StSuite 400Corvallis, OR97330United States

fresc_outreach@usgs.gov

541-750-1030

541-750-1069

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