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Rana palustris

(Pickerel Frog)

Common Names

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Click on the language to view common names.

Common Names in English:

Pickerel Frog

Common Names in French:

Grenouille Des Marais

Description

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Physical Description

Species Rana palustris

Color: Gray to tan, with two rows of dark brown to black blotches running down the back. The blotches are somewhat square to rectangular, and many appear to have a lighter ring of color around them. The belly is light with dark specks. The rear portion of the belly and the inner thighs are bright yellow or orange. xxOther things to look for: This frog has distinctive gold dorsolateral folds running down the back to the legs .

Size/Age/Growth

A slender, medium-sized frog , 4.5 - 8.9 cm (1 3/4 - 3.5 in) in length.

Habitat

Prefers waters that are cool and clear, and can be found in a variety of wooded habitats with nearby bogs or shaded streams . Prefers to locate in low, dense vegetation near cool, shaded bodies of water. Often more common along streams than other large frogs . At times, it will move well away from water into grassy fields .

Typically found at an altitude of 0 to 1,279 meters (0 to 4,196 feet).[1]

Ecology: There are various habitats in wooded regions; vicinity of cool clear streams and ponds in north; warm, turbid swamps in parts of south. Disperses from water's edge into fields and woods in some regions. When inactive , hides at bottom of water body or in caves in some areas. Eggs and larvae develop in standing water of woodland ponds, bog ponds, stream pools, sloughs , and flooded ditches; often in sites with few or no fishes (e.g. , Holomuzki 1995).[2]

List of Habitats: 1.4 Forest - Temperate 3.4 Shrubland - Temperate 4.4 Grassland - Temperate 5.1 Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls ) 5.2 Wetlands (inland) - Seasonal/Intermittent/Irregular Rivers/Streams/Creeks 5.4 Wetlands (inland) - Bogs, Marshes, Swamps, Fens , Peatlands 5.5 Wetlands (inland) - Permanent Freshwater Lakes (over 8ha) 5.6 Wetlands (inland) - Seasonal/Intermittent Freshwater Lakes (over 8ha) 5.7 Wetlands (inland) - Permanent Freshwater Marshes/Pools (under 8ha) 5.9 Wetlands (inland) - Freshwater Springs and Oases 14.1 Artificial/Terrestrial - Arable Land 14.2 Artificial/Terrestrial - Pastureland 15.2 Artificial/Aquatic - Ponds (below 8ha) 15.9 Artificial/Aquatic - Canals and Drainage Channels , Ditches

Biology

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Diet

Eats insects and other small invertebrates .

Reproduction

The Pickerel Frog breeds in late winter and early spring . The female lays up to 2,500 eggs in several masses in shallow water. Eggs are brown and yellow, and egg masses form jelly-like globs underwater. Eggs are attached to submerged vegetation or other solid underwater structures. Transformation from egg to tadpole to frog can take up to three months

Behavior

The Pickerel Frog secretes an irritating substance through its skin which makes it unappetizing to some predators . If kept in captivity with other frogs, its skin secretion will kill them. Snakes that normally eat frogs will avoid this species.

The pickerel frog is generally nocturnal , often remaining concealed in waterside vegetation. Pickerel frogs generally do not wander as far from water as Leopard Frogs. It is dormant during the coldest winter months.

Taxonomy

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Unambiguous Synonyms

  1. Rana palustris mansuetii Hardy, 1964

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: 29-Aug-2005

Similar Species

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The distinctiveness of the blotches and the color of the belly and legs make this an easy frog to identify. The Southern Leopard Frog is the only frog in Georgia that could be confused with the Pickerel Frog. The Southern Leopard Frog has rounded spots and does not have the yellow to orange coloring on the lower belly and thighs that the Pickerel Frog possesses. The Pickerel Frogs can also be distinguished from similar Southern Leopard Frogs by its squarish dorsal spots.

Members of the genus Rana

There are approximately 663 species in this genus. Here are just 100 of them:

R. (Hylarana) · R. (Paa) minica · R. aberae · R. aberdariensis · R. abyssinica · R. acanthi · R. adenopleura · R. adspersa · R. adspersa edulis · R. aequiplicata · R. aesopus · R. affinis · R. afghana · R. agilis · R. albolabris · R. albotuberculata · R. alsopus · R. altaica · R. alticola · R. amamiensis · R. amieti · R. amnicola · R. amurensis · R. amurensis coreana · R. anchietae · R. andersonii · R. angolensis · R. angolensis chapini · R. anlungensis · R. ansorgii · R. apilis · R. aragonensis · R. arathooni · R. archotaphus · R. areolata (Crawfish Frog) · R. areolata aesopus (Crawfish Frog) · R. areolata areolata (Southern Crawfish Frog) · R. areolata capito · R. areolata circulosa (Northern Crawfish Frog) · R. areolata sevosa · R. arfaki · R. arvalis · R. arvalis arvalis · R. arvalis wolterstorffi · R. asiatica · R. asiatria · R. aspera · R. asperata (Yangambi Butterbarbel) · R. asperrima · R. attigua · R. aurantiaca · R. aurata · R. aurora (California Red-Legged Frog) · R. aurora aurora (California Red-Legged Frog) · R. aurora cascadae · R. aurora draytoni · R. aurora draytonii (California Red-Legged Frog) · R. austricola · R. bacboensis · R. balcanica · R. banaorum · R. banjarana · R. bannanica · R. baramica · R. barbouri · R. basaltica · R. beddomii · R. bedriagae · R. bergeri (Italian Poolfrog) · R. berlandieri (Rio Grande Leopard Frog) · R. berlandieri forreri · R. betsileanus · R. bibronii · R. bicolor · R. binotata · R. blairi (Plains Leopard Frog) · R. blythi · R. blythii · R. bolavensis · R. boulengeri · R. boylei · R. boyli · R. boylii (Foothill Yellow Legged Frog) · R. boylii boylii (Foothill Yellow-Legged Frog) · R. boylii mucosa · R. boylii muscosa · R. boylii sierrae · R. boyli boyli · R. brachycephala · R. brama · R. breviceps · R. brevipalmata · R. brevipoda · R. brownorum · R. bunoderma · R. burnsi · R. bwana · R. bwanade · R. cacondana · R. caldwelli

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal February 29, 2008:

Identifiers

Footnotes

  1. Mean = 240.800 meters (790.026 feet), Standard Deviation = 236.100 based on 344 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
  2. Hammerson, G. 2004. In IUCN 2008. 2008 IUCN Red List of Threatened Species. IUCNRedList.org. Downloaded July 18, 2008. [back]
Last Revised: 2009-05-05