Status and Trends

Reports & Publications

Effect of Species Rarity on the Accuracy of Species Distribution Models 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+Inland Waters
(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.

6 Total Items

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Research Natural Areas of Southern Oregon: Amphibians

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

fresc.usgs.gov — An overview of research that defines the distribution and habitat requirements of amphibians and reptiles in southern Oregon, mostly in old-growth forests or alpine habitats. Includes links to USGS publications resulting from this research.

ARMI - Midwest Region Amphibian Research and Monitoring Initiative

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

www.umesc.usgs.gov — Populations of amphibians have been declining around the world (Stokstad 2004). This website provides links to resources that deal with amphibian declines mainly in the 13-state Upper Mississippi ARMI region, species, current research, research methods, research team profiles, a list of partners, products, frog and toad calls, other links related More...

Frogwatch USA

Publisher: Other Federal Agency (National Wildlife Federation) | Format: URL

www.nwf.org — Frogwatch USA website is a long-term frog and toad monitoring program managed by the National Wildlife Federation in partnership with the United States Geological Survey. This resource provides valuable information about frog and toad distributions, population trends at individual wetlands, and yearly patterns of frog and toad breeding activity.

FrogWeb: Amphibian Declines

Publisher: NBII | Format: URL

www.nbii.gov — A web resource for research in amphibian declines phenomena, habitat loss, climate change by exposure to UV radiation, contaminants and pollutants, disease, and predation by invasive species. General resources relating to declines phenomena and monitoring tools and resources are available on this webpage.

National Resources Monitoring Partnership (NRMP)

Publisher: NBII | Format: URL

www.nbii.gov — Natural resource managers face complex decisions that require a clear understanding of the status of wildlife populations and their habitats. Monitoring is key to making effective management decisions and evaluating the outcomes of those decisions. The goal of NRMP is to improve the accessibility of monitoring efforts to resource managers to aid More...

National Resources Monitoring Partnership (NRMP) Newsletter

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

www.fort.usgs.gov — Natural Resource Monitoring Partnership (NRMP) is a collaborative effort by the natural resource management community to improve monitoring efforts in order to support effective evaluation and decision-making by sharing information on monitoring projects and protocols. The Natural Resource Monitoring Partnership was built for easy access to More...