Status and Trends

Reports & Publications

Effect of Species Rarity on the Accuracy of Species Distribution Models Influences of Wildfire and Channel Reorganization on Spatial and Temporal Variation in Stream Temperature and the Distribution of Fish and Amphibians Measuring and Monitoring Biological Diversity: Standard Methods for Amphibians Status and Trends of the Nation's Biological Resources, vols. 1-2

Subtopics

Amphibians

Frogs & Toads Salamanders

Related Subjects

Agricultural Practice (Impacts)

Threatened and Endangered Species

Amphibians
(Frogs, Toads, and Salamanders) - The continental United States is home to at least 230 amphibian species: 90 frog and toad species, and 140 species of salamanders. Amphibians appear in cities and in natural areas, as well as rainforests and in wetlands. Healthy amphibian populations that once thrived are now on the decline worldwide. In the U.S. alone, declines in amphibian populations are particularly serious in California, the Rocky Mountains, the Southwest, and Puerto Rico. This decline has been a result of amphibian malformations - extra limbs, malformed or missing limbs, and facial malformations. These malformations have been documented in 44 states, and involve nearly 60 species. In some local populations, up to 60% of the amphibians exhibit malformations.

Did You Know...?

USGS Frog Quiz
You can identify different amphibian species by their unique vocalizations or "frog calls." Not all amphibian species make vocalizations, but many frogs and toads do.

60 Total Items

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National Park Service Inventory and Monitoring Program

Publisher: Other Federal Agency (National Park Service (NPS)) | Format: URL

science.nature.nps.gov — This website represents National Park Service Inventory and Monitoring Program's goal to collect, organize, and make available natural resource data and to contribute to the Service's institutional knowledge. Its goals are to inventory the natural resources under National Park Service stewardship to determine their nature and status; monitor park More...

ARMI - FRESC Corvallis Research Group: Amphibian Research and Monitoring Initiative

Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL

fresc.usgs.gov — ARMI is an initiative of agencies within the United States Department of the Interior to measure, understand, and respond to effects of environmental change upon the Nation's amphibians. Amphibians have been disappearing from many locations around the world and reports of declines have increased in recent decades. Some of the most dramatic More...

ARMI - Rocky Mountain Region (FORT) Amphibian Research and Monitoring Initiative

Publisher: USGS | Science Center: Fort Collins Science Center (FORT, Ft. Collins) | Format: URL

www.fort.usgs.gov — The Department of the Interior's Amphibian Research and Monitoring Initiative (ARMI) is designed to determine where populations of amphibians are present, to monitor specific apex populations, and to investigate potential causes of decline and deformity. The Rocky Mountain Region of ARMI encompasses Montana, Wyoming, Colorado, and New Mexico. Two More...

ARMI - Southeast Amphibian Research and Monitoring Initiative

Publisher: USGS | Science Center: Florida Integrated Science Center (FISC, Gainesville) | Format: URL

fl.biology.usgs.gov — The objectives of Southeastern ARMI are to determine the status and trends of amphibian populations on DOI lands in the southeastern United States and U.S. Caribbean and to provide information useful in determining causes of declines should they be discovered. Meeting the needs and expectations of the Nation for monitoring the status of More...

North American Reporting Center for Amphibian Malformations (NARCAM)

Publisher: NBII | Format: URL

www.nbii.gov — NARCAM is a website reporting system for malformed amphibian malformations. The site is a portal of archives for malformed amphibian phenomena reports in the United States and Canada. Users can submit a Report to NARCAM, view malformations data, with access to maps of malformation occurrences. You can also learn more about the UV radiation, More...

FrogWeb: Amphibian Declines & Malformations

Publisher: Center for Biological Informatics | Format: URL

www.frogweb.gov — Amphibian population declines are particularly serious in California, the Rocky Mountains, the Southwest, and Puerto Rico. This website addresses this concern by linking to resources about Amphibian Declines, Amphibian malformations, and resources to what can be done to help. There are additional links to species information and resources for More...

Farm ponds as critical habitats for native amphibians

Publisher: USGS | Science Center: Upper Midwest Environmental Sciences Center (UMESC, LaCrosse) | Format: URL

www.umesc.usgs.gov — Constructed farm ponds represent significant breeding, rearing, and overwintering habitat for amphibians in the Driftless Area Ecoregion of southeastern Minnesota, western Wisconsin, and northeastern Iowa, a landscape where natural wetlands are scarce. Farm ponds are to prevent soil erosion and create wildlife habitat, yet no studies have been More...

Amphibians of North Cascades and Olympic National Parks

Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL

fresc.usgs.gov — Apparent declines in amphibians have highlighted the need to assess the status of amphibian populations and to determine basic information concerning distribution and trends. This resource describes a study that inventories stream-breeding and pond-breeding amphibians in two large national parks, using sampling data to develop monitoring More...

Evaluation of the Effects of Ultraviolet Radiation on Amphibians Based on Field Dosimetry and the Distribution of Subpopulations within Metapopulations

Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL

fresc.usgs.gov — There is no question that solar ultraviolet (UV) radiation causes reduced survival and a wide range of malformations in amphibian taxa. This study addresses two independent but related questions: First, is UV radiation affecting amphibian populations? Second, can patch occupancy predictions, based on metapopulation theory, provide a useful More...

Movement and Habitat Use of the California Red-Legged Frog

Publisher: USGS | Format: URL

armi.usgs.gov — Once an abundant frog throughout much of central and southern California, the California red-legged frog (Rana draytonii) is now rare in the Sierra Nevada foothills and the southern portion of its range. In parts of the central California Coast Range, however, large, vigorous populations do remain. This species profile focuses on breeding sites More...

Tadpoles of the Southeastern United States Coastal Plain

Publisher: USGS | Science Center: Florida Integrated Science Center (FISC, Gainesville) | Format: URL

fl.biology.usgs.gov — This field guide is designed as a usable reference for identifying tadpoles of most of the frog species of the Southeastern United States Coastal Plain region. It contains large color photographs, detailed tadpole descriptions and other useful information to aid in the identification of each species.

Green Treefrog

Publisher: USGS | Science Center: Florida Integrated Science Center (FISC, Gainesville) | Format: URL

fl.biology.usgs.gov — This webpage is a species profile of the Green Treefrog (Hyla cinerea), with information on its Appearance, habitat, Vocalization, and images for identification.