Lithobates sylvaticus

Contents

Lithobates sylvaticus is a widely distributed amphibian commonly known as the wood frog, noted for its cold tolerance and rapid breeding phenology. It occupies boreal and temperate regions across North America and is a focal species in studies by institutions such as the Smithsonian Institution, National Geographic Society, and universities including Harvard University, University of Alaska Fairbanks, and University of Toronto. Its physiology and ecology have been examined in the context of climate research at organizations like the National Aeronautics and Space Administration and the National Oceanic and Atmospheric Administration.

Taxonomy and Nomenclature

Lithobates sylvaticus was first described by LeConte in 1825 and has been treated variably in taxonomies produced by the American Museum of Natural History, International Commission on Zoological Nomenclature, and the Royal Society of London. Debates over generic placement have involved authors affiliated with the American Society of Ichthyologists and Herpetologists, the Society for the Study of Amphibians and Reptiles, and comparative studies published in journals associated with the Royal Society Publishing and Oxford University Press. Synonymy and nomenclatural history appear in catalogues maintained by the Natural History Museum, London and the Canadian Museum of Nature.

Adults typically measure 2.5–7.5 cm and present a dorsal coloration ranging from brown to tan with a characteristic dark mask across the eyes; morphological descriptions have been used in field guides from the National Audubon Society, Audubon Field Guides, and the Peterson Field Guides series. Anatomical and physiological traits have been quantified in comparative studies at the American Museum of Natural History, the Smithsonian Institution, and laboratories at Yale University and the University of British Columbia. Diagnostic features used by the U.S. Fish and Wildlife Service and the Canadian Wildlife Service include skin texture, limb proportions, and cranial morphology, often illustrated in keys produced by the Missouri Botanical Garden and the Royal Ontario Museum.

This species ranges across boreal and temperate North America from the Yukon and Nunavut through much of Canada and into the northeastern and north-central United States, including regions such as Maine, Minnesota, Montana, and Pennsylvania. Its preferred habitats include ephemeral wetlands, boreal forests, and vernal pools documented in conservation plans by the U.S. Fish and Wildlife Service, the Canadian Wildlife Federation, and regional agencies like Alaska Department of Fish and Game. Landscape-level occurrences have been mapped in collaboration with the Nature Conservancy, the World Wildlife Fund, and municipal natural heritage programs in provinces such as Ontario and states such as Vermont.

Seasonal migrations to breeding sites have been the subject of telemetry and mark–recapture studies at institutions like the University of Minnesota, McGill University, and University of Maine. Wood frogs exhibit cryoprotective adaptations studied by researchers at the University of Alaska Fairbanks, the Smithsonian Tropical Research Institute, and the National Institutes of Health with links to physiological work at the Max Planck Society and Karolinska Institutet. Its role in food webs involves predators and competitors such as species monitored by the Audubon Society, the Nature Conservancy, and regional wildlife agencies; interactions with pathogens have been investigated alongside researchers from the Centers for Disease Control and Prevention and the Amphibian Ark.

Breeding occurs in spring in vernal pools and shallow wetlands, with egg masses and larval development documented in field studies coordinated by the Ecological Society of America, the Society for Conservation Biology, and university labs at Dartmouth College, Pennsylvania State University, and the University of New Hampshire. Developmental timing and metamorphosis have been analyzed in comparative embryology work at Harvard University and the University of California, Berkeley, while phenological shifts have been modeled by teams at the Intergovernmental Panel on Climate Change and the National Center for Atmospheric Research.

Although currently listed as Least Concern by the International Union for Conservation of Nature, population trends are monitored by agencies such as the U.S. Fish and Wildlife Service, the Canadian Wildlife Service, and regional conservation NGOs including the Nature Conservancy and the Sierra Club. Threats include habitat loss from development projects reviewed by municipal governments and environmental assessments overseen by bodies like the Environmental Protection Agency and provincial ministries in Canada. Disease emergence, climate change impacts, and road mortality have prompted monitoring programs supported by the National Science Foundation, the Wildlife Conservation Society, and international collaborations involving the IUCN SSC Amphibian Specialist Group.

Category:Ranidae Category:Amphibians of North America