Pseudacris regilla 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Hylidae

Scientific Name: Pseudacris regilla (Baird & Girard, 1852)
Common Name(s):
English Pacific Treefrog, Pacific Chorus Frog
Taxonomic Source(s): Frost, D.R. 2014. Amphibian Species of the World: an Online Reference. Version 6.0 (7 July 2014). Electronic Database. American Museum of Natural History, New York, USA. Available at:
Taxonomic Notes: Recuero et al. (2006) examined patterns of mtDNA variation (including new samples and additional samples presented by Ripplinger and Wagner 2004) and reviewed available allozyme data for Pseudacris regilla (sensu lato). They concluded that P. regilla should be partitioned into three species, P. regilla, P. sierra, and P. hypochondriaca (the original proposal included different names based on taxonomic errors that were subsequently corrected). The authors did not provide detailed maps or descriptions of the ranges of the three proposed species and did not describe the contact zones between P. sierra and the other two species.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Needs updating
Assessor(s): Geoffrey Hammerson, Georgina Santos-Barrera
Reviewer(s): Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson, Neil Cox and Bruce Young)
Listed as Least Concern in view of its wide distribution, tolerance of a broad range of habitats, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category. Recuero et al. (2006) proposed that this species be split into three species; all of these would be Least Concern.

Geographic Range [top]

Range Description:This species occurs from southern British Columbia in Canada through the USA to Baja California, Mexico, then east to Montana, Idaho, and Nevada. It also occurs on the Channel Islands off southern California (Behler and King 1979). Desert populations in southern California were probably introduced. It is introduced on Queen Charlotte Islands, British Columbia (Reimchen 1990), Canada. It was recently found on Revillagigedo Island in Alexander Archipelago, Alaska, where it is probably breeding and was possibly introduced (Waters 1992). It occurs from sea level to over 3,000m asl.
Countries occurrence:
Canada; Mexico; United States
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There are many occurrences of this highly abundant species.
Current Population Trend:Stable
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is found in a wide variety of habitats including grassland, chaparral, woodland, forests and farmland. It is usually found among low vegetation near water. It breeds in marshes, lakes, ponds, ditches, reservoirs and slow-moving streams (Stebbins 1985). It lays eggs on submerged plant stems or on the bottom. It sometimes breeds in weakly brackish water.
Systems:Terrestrial; Freshwater

Threats [top]

Major Threat(s): Introduced mosquito fish (Gambusia affinis) prey heavily on larvae and might negatively affect this species' populations (Goodsell and Kats 1999). However, this is not a pervasive threat. It is sometimes found in the international pet trade but at levels that do not currently constitute a major threat.

Conservation Actions [top]

Conservation Actions: This species' range overlaps numerous protected areas throughout its range.

Citation: Geoffrey Hammerson, Georgina Santos-Barrera. 2004. Pseudacris regilla. The IUCN Red List of Threatened Species 2004: e.T55897A11376273. . Downloaded on 20 September 2018.
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