The Green Frog is characterized by moist skin, a round snout, a generally uniform color sometimes marked with small, irregular, indistinct black spots, and a raised fold or ridge of skin on each side of the back running from behind the eye down the back. The head, body, and limbs are olive to olive-brown, sometimes with small black spots on the back. The limbs have dark, in distinct narrow bands. The belly and throat are white, the latter sometimes flecked with gray. The inner finger of the hands of males is swollen at the base. Females are heavier during the breeding season.
Adults normally 54-90 mm (21⁄8-3½ inches) in snout-vent length. The largest Kansas specimen is a female (KU 17474) from Cherokee County with a snout-vent length of 88 mm (3½ inches) collected by Edward H. Taylor and Hobart M. Smith on 25 March 1933. The maximum length throughout the range is 108 mm (4¼ inches) (Conant and Collins, 1998).
This frog is known from the Spring River and its tributaries in Cherokee County. An old record from Miami County (KU 9281, which is now lost) was taken near the Marais des Cygnes River at Osawatomie on 11 July 1911.
Miller (1985) studied the Green Frog in Cherokee County, and much of the available information is based on his observations.
This frog generally prefers still water with lush aquatic vegetation and frequents the edges of swamps, marshes, ponds, ditches, strip pits, and backwater sloughs of streams and rivers. Smith (1932) first reported this species from Kansas, collecting three adults on 24- 27 March at night from permanent stripmine ponds in Cherokee County. Smith (1934, 1956) commented on the solitary habits of this creature and believed this frog to inhabit permanent pools and streams. Collins (1974, 1982) observed a Green Frog on 18 March in a backwater stream-slough of Shoal Creek in Cherokee County. This amphibian is probably active from early March to late October.
This frog normally breeds on warm nights from early April to late June. Smith (1932) observed a number of Green Frog tadpoles from 3 to 5 April in permanent stripmine ponds in Cherokee County. Rundquist and Collins (1977) reported this frog calling in the same county during April. Miller (1985) heard choruses of up to 12 individuals of this frog in Cherokee County and recorded them calling from 2 to 22 June at air temperatures between 68° and 85°F. Male Green Frogs are territorial during the breeding season and defend their territory from intruding frogs by kicking, bumping, and biting. The eggs hatch into tadpoles which metamorphose after approximately three months. Their summer breeding call sounds like the pluck of a loose banjo string and can be heard both day and night. They breed in permanent ponds and along streams with vegetated borders.
The adults eat invertebrates and occasionally small frogs and fish. Rather than chase their prey, they sit and eat whatever comes by. Smith (1934, 1956) reported this species feeding primarily on terrestrial insects.
Smith (1932) first reported the Green Frog from abandoned strip pits 3-5 miles north of Baxter Springs near the Spring River. From the same locality, he also reported Eurycea spelaeus, Eurycea longicauda, and Lithobates palustris from Kansas for the first time.
The oldest potential specimen (KU 9281) from Kansas was collected from the Marais des Cygnes River at Osawatomie on 11 July 1911. This specimen has been missing from the KU collection since September 1972 when it was put on loan to Coleman J. Goin. It is presumed lost. There have been no other collections of this species outside of Cherokee County. The next earliest series of specimens was near Riverton (KU 16205 collected on 26 March 1932, KU 17473-5 collected on 25 March 1933, KU 20388-94 collected in April 1932, and KU 23166-7 collected on 20 October 1945 have all been missing (and presumed lost) since September 1972 as well (Joseph T. Collins, pers. comm). The earliest existing specimen (KU 154015) was collected in a backwater of Shoal Creek at Schermerhorn Park, Cherokee County, on 3 March 1973.
Collins (1982) surveyed the Ozark Plateau for this species without success. He suggested at that time that this taxon be designated as state Endangered Species. Miller (1985) studied this frog in southeastern Kansas, and much of our current understanding is due to his efforts. He was able to document three additional localities for this frog in the Ozark Plateau of southeastern Cherokee County.
Efforts to corroborate the Miami County record were unsuccessful during this study, however, suitable habitat does exist along the Marais des Cygnes and many of its tributaries in eastern Kansas. Further support for the possible existence of a northern population is supported by specimens reported by (Daniel and Edmond, 2005) just to the east in Missouri.
This species can be found in the backwaters along the Spring River and Shoal Creek. In certain localities, it can be the second most observably abundant anuran (behind the Cricket Frog). An extensive survey along the Spring River and its tributaries (Turkey, Shoal, Brush, Shawnee, and Cow creeks) would certainly help to clarify its status in the state.
Listed as a Kansas Threatened species in 1987. No recovery plan has been completed. Platt et al. (1974) recommended that any breeding sites of this species on state, county, or federal property or on the property of willing landowners be designated sanctuaries and protected from disturbance. Collins (1980) noted the precarious status of the Green Frog in Kansas and recommended it be designated an endangered species in the state. Miller (1985) also recommended that this frog be designated an endangered species.
As defined by Kansas Administrative Regulations, critical habitats include those areas documented as currently supporting self-sustaining population(s) of any threatened or endangered species of wildlife as well as those areas determined by the Kansas Department of Wildlife, Parks, and Tourism to be essential for the conservation of any threatened or endangered species of wildlife.
Currently, the following areas are designated critical for Green Frogs:
(1) All waters and wetlands within or upon the main stem Spring River channel and adjacent floodplain from the river's point of entry into Cherokee County at Sec. 1, T33S, R25E, to its point of departure at Sec. 18, T35S, R25E.
(2) All waters and wetlands within or upon the main stem Shoal Creek Channel and adjacent floodplain from the creek's point of entry into Cherokee County at Sec. 36, T34S, R25E, to its confluence with Spring River at Sec. 19, T34S, R25E.
References
Ortenburger, Arthur I. 1928. The whip snakes and racers: Genera Masticophis and Coluber. Memiors of the University of Michigan Museum (1):1-247.
Smith, Hobart M. 1932. A report upon amphibians hitherto unknown from Kansas. Transactions of the Kansas Academy of Science 35:93-96.
Smith, Hobart M. 1933. The Amphibians of Kansas. Thesis. University of Kansas, Lawrence. 383 pp.
Smith, Hobart M. 1934. The Amphibians of Kansas. The American Midland Naturalist 15(4):377-527.
Brumwell, Malcolm J. 1936. Distributional records of the reptilia and amphibians of Kansas. Privately printed. 22 pp.
Mansueti, Romeo. 1941. A descriptive catalogue of the amphibians and reptiles found in and around Baltimore City, Maryland, within a radius of twenty miles. Proceedings of the Natural History Society of Maryland 7:1-53.
Smith, Hobart M. 1950. Handbook of Amphibians and Reptiles of Kansas. University of Kansas, Museum of Natural History, Miscellaneous Publication (2):336.
Schmidt, Karl P. 1953. A Check List of North American Amphibians and Reptiles. 6th Edition. University of Chicago Press, Chicago, Illinois. 280 pp.
Smith, Hobart M. 1956. Handbook of Amphibians and Reptiles of Kansas. Second edition. University of Kansas Museum of Natural History Miscellaneous Publication (9):1-356.
Gier, Herschel T. 1967. Vertebrates of the Flint Hills. Transactions of the Kansas Academy of Science 70(1):51-59.
Collins, Joseph T. 1974. Amphibians and Reptiles in Kansas. University of Kansas Museum of Natural History Public Education Series (1):283 pp.
Platt, Dwight R., Joseph T. Collins, and Ray E. Ashton, Jr. 1974. Rare, endangered and extirpated species in Kansas. II. Amphibians and reptiles. Transactions of the Kansas Academy of Science 76(3):185-192.
Rundquist, Eric M. 1976. Field checklist (of) amphibians and reptiles of Kansas. Kansas Herpetological Society, Lawrence.
Ashton, Ray E., Jr., Stephen R. Edwards, and George R. Pisani. 1976. Endangered and threatened amphibians and reptiles in the United States. Herpetological Circulars (5):65.
Rundquist, Eric M. and Joseph T. Collins. 1977. The amphibians of Cherokee County, Kansas. Kansas Biological Survey, Lawrence. 12 pp.
Perry, Janice. 1977. Kansas herps needed. Kansas Herpetological Society Newsletter (18):2-3.
Gray, Peter. 1979. Low attendance slows KHS. Kansas Herpetological Society Newsletter (32):1.
Collins, Joseph T. 1982. Report to the Kansas Fish and Game Commission on the status of three amphibians in southeastern Kansas. Kansas Fish and Game Commission, Pratt. 57 pp.
Collins, Joseph T. 1982. Amphibians and Reptiles in Kansas. 2nd edition. University of Kansas Museum of Natural History Public Education Series (8).
Stewart, Margaret M. 1983. Rana clamitans. Catalogue of American Amphibians and Reptiles (337):1-4.
Brown, Kenneth L. 1984. Pomona: A plains village variant in eastern Kansas and western Missouri. Dissertation. University of Kansas, Lawrence, Kansas. 519 pp.
Secor, Stephen M. and Charles C. Carpenter. 1984. Distribution maps of Oklahoma reptiles. Oklahoma Herpetological Society Special Publication (3):1-57.
Miller, Larry L. 1985. Investigation of the Green Frog Rana clamitans melanota in southeastern Kansas. Kansas Fish and Game Commission, Pratt. 16 pp.
Layher, William G., Ken L. Brunson, J.Schaefer, Marvin D. Schwilling, and R. D. Wood. 1986. Summary of nongame task force actions relative to developing three species lists: Species in Need of Conservation, Threatened, and Endangered. Kansas Fish and Game Commission, Pratt. 27 pp.
Busby, William H. 1988. The Kansas Natural Heritage Program: Taking stock of Kansas' natural heritage. Kansas Herpetological Society Newsletter (71):9-12.
Simmons, John E. 1989. Endangered and threatened in Kansas. Kansas Herpetological Society Newsletter (75):4-5.
Collins, Joseph T. 1990. Maximum size records for Kansas amphibians and reptiles. Kansas Herpetological Society Newsletter (81):13-17.
Conant, Roger and Joseph T. Collins. 1991. Peterson Field Guide to Reptiles and Amphibians of Eastern and Central North America. 3rd ed. Houghton Mifflin Company, Boston, Massachusetts.
Rundquist, Eric M. 1992. Kansas endangered, threatened, and SINC species. Kansas Herpetological Society Newsletter (91).
Taggart, Travis W. 1992. KHS field trips. Kansas Herpetological Society Newsletter (91):3.
Collins, Joseph T. and Suzanne L. Collins. 1993. Amphibians and Reptiles in Kansas. Third Edition. University Press of Kansas, Lawrence, Lawrence. 397 pp.
Rundquist, Eric M. 1994. 1994 Field Trip. Kansas Herpetological Society Newsletter (95):3-4.
Moriarty, Emily C. and Joseph T. Collins. 1995. First known occurrence of amphibian species in Kansas. Kansas Herpetological Society Newsletter (100):28-30.
Rakestraw, J. 1996. Spring herp counts: A Kansas tradition. Reptile & Amphibian Magazine (March-April):75-80.
Conant, Roger and Joseph T. Collins. 1998. Peterson Field Guide to Reptiles and Amphibians of Eastern and Central North America. 3rd ed, expanded. Houghton Mifflin Company, Boston, Massachusetts.
Powell, Robert, Joseph T Collins, and Errol D Hooper Jr. 1998. A Key to Amphibians & Reptiles of the Continental United States and Canada. Univ Press of Kansas, Lawrence, Kansas. 131 pp.
Gamble, Jerre. 1998. Marais des Cygnes National Wildlife Refuge Comprehensive Conservation Plan. U.S. Fish and Wildlife Service, Hartford, Kansas. 91 pp.
Taggart, Travis W. 1999. Cherokee County fall 1999 herp count. Kansas Herpetological Society Newsletter (117):6.
Kingsbury, Bruce and Joanna Gibson. 2002. Habitat Management Guidelines for Amphibians and Reptiles of the Midwest. Publication of Partners in Amphibian and Reptile Conservation, Address not given. 152 pp.
Lannoo, Michael (Editor). 2005. Amphibian Declines: The Conservation Status of United States Species. University fo California Press, Berkeley. 1115 pp.
Daniel, Richard and Brian Edmond. 2005. Atlas of Missouri Amphibians and Reptiles. Privately printed, Jefferson City, Missouri. 68 pp pp.
Hillis, David M. and Thomas P. Wilcox. 2005. Phylogeny of the New World True Frogs (Rana).. Molecular Phylogenetics and Evolution 34(2):299-314.
Altig, Ronald, Roy W. McDiarmid, Kimberly A. Nichols, and Paul C. Ustach. 2006. Tadpoles of the United States and Canada: A Tutorial and Key. Electronic files accessible at http://www.pwrc.usgs.gov/tadpole/. Patuxent Wildlife Research Center, Laurel, MD, USA. .
Taggart, Travis W. 2006. Distribution and status of Kansas herpetofauna in need of information. State Wildlife Grant T7. Kansas Department of Wildlife and Parks, Pratt. vii + 106 pp.
Frost, Darrel R, Taran Grant, Julian Faivovich, Raoul H. Bain, Alexander Haas, Celio F. B. Haddad, Rafael O. De Sa, Alan Channing, Mark Wilkinson, Stephen C. Donnellan, Christopher J. Raxworthy, Jonathan A. Campbell, Boris L. Blotto, Paul Moler, Robert C. Drewes, Ronald A. Nussbaum, John D. Lynch, David M. Green, and Ward C. Wheeler. 2006. The amphibian tree of life. Bulletin of the American Museum of Natural History (297):370.
Economics, Industrial, Incorporated. 2008. Cherokee County: Restoration Plan / Environmental Assessment. Prepared for: US Department of the Interior, US Fish and Wildlife Service. Industrial Economics, Incorporated, Cambridge, MA. 138 pp.
Austin, James D. and Kelly R. Zamudio. 2008. Incongruence in the pattern and timing of intra-specific diversification in Bronze Frogs and Bullfrogs (Ranidae). Molecular Phylogenetics and Evolution 48:1041-1053.
Meshaka, Walter E., Jr., Samuel D. Marshall, Larry R. Raymond, and Laurence M. Hardy. 2009. Seasonal activity, reproductive cycles, and growth of the Bronze Frog (Lithobates clamitans clamitans) in northern Louisiana: The long and short of it. Journal of Kansas Herpetology (29):12-20.
Collins, Joseph T., Suzanne L. Collins, and Travis W. Taggart. 2010. Amphibians, Reptiles, and Turtles of Kansas. Eagle Mountain Publishing., Provo, Utah. 400 pp.
Taggart, Travis W. 2011. Kansas Herpetological Society 2011 spring field trip to be held in Chautauqua County. Journal of Kansas Herpetology (37):5-7.
Rohweder, Megan R. 2012. Spatial conservation prioritization of Kansas for terrestrial vertebrates. Thesis. Fort Hays State University, Hays, Kansas. 151 pp.
Powell, Robert, Joseph T Collins, and Errol D Hooper Jr. 2012. Key to the Herpetofauna of the Continental United States and Canada: Second Edition, Revised and Updated. Univ Press of Kansas, Lawrence, Kansas. 152 pp.
Dodd, C. Kenneth. 2013. Frogs of the United States and Canada. John Hopkins University Press, Baltimore, Maryland. 982 pp.
Taggart, Travis W. 2014. Recent scientific and standard English name changes effecting the Kansas herpetofauna. Collinsorum 3(2-4):9-10.
Rohweder, Megan R. 2015. Kansas Wildlife Action Plan. Ecological Services Section, Kansas Department of Wildlife, Parks and Tourism in cooperation with the Kansas Biological Survey. 176 pp.
Powell, Robert, Roger Conant, and Joseph T. Collins. 2016. Peterson Field Guide to Reptiles and Amphibians of Eastern and Central North America. Houghton Mifflin Harcourt, Boston. 494 pp.
Taggart, Travis W. and J. Daren Riedle. 2017. A Pocket Guide to
Kansas Amphibians,
Turtles and Lizards. Great Plains Nature Center, Wichita, Kansas. 69 pp.
Crother, Brian I. (editor). 2017. Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, with Comments Regarding Confidence in Our Understanding. Eighth edition. Herpetological Circulars (43):1-102.
Powell, Robert, Joseph T Collins, and Errol D Hooper Jr. 2019. Key to the Herpetofauna of the Continental United States and Canada. Third Edition. Univ Press of Kansas, Lawrence, Kansas. 192 pp.
Daniel, Richard E. and Brian S. Edmond. 2020. Atlas of Missouri Amphibians and Reptiles for 2019. Privately printed, Columbia, Missouri. 86 pp.
Riedle, J. Daren. 2020. Revisiting Kansas Herpetological Society field trip and Herp Count data:
Distributional patterns and trend data of Kansas amphibians and reptiles. Collinsorum 9(1):7-16.
Taggart, Travis W and Sarah L Taggart. 2021. Herp Count: Cherokee County: KHS-2020-03. Collinsorum 9(3):12.
MacGuigan, Daniel J., Genevieve G. Mount, Gregory J. Watkins-Colwell, Thomas J. Near, and Max R. Lambert. 2022. Genomic data clarify Aquarana systematics and reveal isolation-by-distance
dominates phylogeography of the wide-ranging frog Rana clamitans. Ichthyology & Herpetology 110(3):602-617.
Dodd, C. Kenneth. 2023. Frogs of the United States and Canada. Second Edition. John Hopkins University Press, Baltimore, Maryland. 1032 pp.
Hofmeier, Jordan. 2025. For the future: Conserving Kansas' endangered wildlife. Kansas Wildlife & Parks Magazine 2025(November):17-23.