How many amphibian species are there in the United States?

More than 6,000 amphibian species exist worldwide, with approximately 300 of them found in the United States. 

The USGS is the lead agency for the Amphibian Research and Monitoring Initiative (ARMI), a program of amphibian monitoring, research, and conservation that was established in response to the worldwide decline of amphibian species. 

Related Content

Filter Total Items: 3

What is the United States doing about amphibian deformity and decline issues?

In response to indications of worldwide declines in amphibian populations, Interior Department agencies were directed to initiate a national program of amphibian monitoring, research, and conservation. There is an urgent need to determine the scope and severity of the problem and to investigate causes. As a result, the USGS formed the National...

What causes deformities in frogs, toads, and other amphibians?

Malformed frogs first came to national attention in 1995. Since that time, reports of malformed frogs and other amphibians have increased dramatically. Malformations have been reported in at least 44 states and in more than 50 species of frogs and toads. Multiple limbs, missing limbs, and facial abnormalities are the main malformations seen. Frog...

Why are frog and toad populations declining? 

Research suggests that even though amphibians are severely declining worldwide, there is no smoking gun—and thus no simple solution—to halting or reversing these declines. Though every region in the United States has suffered amphibian declines, threats differ among regions. They include: Human influence from the Mississippi River east, including...
Filter Total Items: 7
Date published: March 6, 2019

New Species Habitat Distribution Maps Now Support Conservation Planning at a National Scale

A new dataset of habitat distribution for terrestrial vertebrate species in the conterminous United States is now available from the USGS.

Date published: December 13, 2016

Saving Salamanders: Vital to Ecosystem Health

Amphibians—the big-eyed, swimming-crawling-jumping-climbing group of water and land animals that includes frogs, toads, salamanders and worm-like caecilians—are the world’s most endangered vertebrates. 

Date published: May 23, 2016

New Research Confirms Continued, Unabated and Large-Scale Amphibian Declines: Local Action Key to Reversing Losses

New U.S. Geological Survey-led research suggests that even though amphibians are severely declining worldwide, there is no smoking gun – and thus no simple solution – to halting or reversing these declines.

Date published: February 22, 2016

Deadly Amphibian Fungus Abroad Threatens Certain U.S. Regions

The areas of the United States that are most at risk of a potentially invasive salamander fungus are the Pacific coast, the southern Appalachian Mountains and the mid-Atlantic regions, according to a recently published U.S. Geological Survey report.

Date published: January 20, 2016

Invasive Amphibian Fungus Could Threaten US Salamander Populations

A deadly fungus causing population crashes in wild European salamanders could emerge in the United States and threaten already declining amphibians here, according to a report released today by the U.S. Geological Survey.

Date published: March 29, 2000

New USGS Research Shows How Land Use Affects Amphibians

New USGS research shows that rural areas and farms may be friendlier to frogs and toads than urban areas. Dr. Melinda Knutson, a conservation scientist with the U.S. Geological Survey, said the research on frog and toad populations in two Midwestern states shows that frog and toad abundance and species richness were low in urban areas but near normal in agricultural areas.

Filter Total Items: 17
September 28, 2017

2017 September Evening Public Lecture — What's in a species name?

Title: What's in a species Name?: How wildlife management relies on modern systematics research and museum collections
* What have museum collections taught us about invasive diseases?
* When is an endangered species not a species?
* How can birds in a museum help protect airline passengers?
* How do geology and biology govern what species we find on

Chinese firebelly new
December 31, 2016

Chinese Firebelly Newt

A Chinese firebelly newt (Cynops orientalis), the first salamander species found to be infected with the spring viraemia of carp virus.

Northern leopard frog floating in the water in Glen Canyon.
December 15, 2016

Northern leopard frog in Glen Canyon

Northern leopard frog in Glen Canyon.

Eft stage of red-spotted newt
September 27, 2016

Eft stage of red-spotted newt

The eft stage of a red-spotted newt.

Attribution: Ecosystems
February 3, 2016



An invasive American bullfrog with tracking device.
December 31, 2014

An invasive American bullfrog with tracking device.

An invasive American bullfrog with tracking device.  

Image: Green Tree Frog
December 31, 2014

Green Tree Frog

This green tree frog (Hyla cinerea) sits on the lip of a pitcher plant in a bog in Alabama. The frog was down in the pitcher plant, but moved up to rest on its edge as the photographer approached.

Image: Weighing a Toad
July 31, 2013

Weighing a Toad

USGS technician weighing a Yosemite toad in the field.

Image: Frog in Hiding
July 12, 2010

Frog in Hiding

Frog in hiding along the Sheyenne River southeast of Maddock, North Dakota.  Photograph taken during a bioassessment of the area.

June 30, 2010

Evening Frog Calls

An impressive chorus of frogs recorded at 9:00 pm on July 1, 2010 at Lake Ramsey Savannah State Wildlife Management Area near Covington, LA. Over the constant staccato "machine gun" call of the Pinewoods Treefrog (Hyla femoralis) you can hear the repetitive nasal "trill" of the Cope's Gray Treefrog (Hyla chrysoscelis) and the frequent sheep-like bleats of the Eastern

USGS Scientist Mark Roth listening to frog calls.
December 31, 2002

USGS Scientist Mark Roth listening to frog calls.

USGS Scientist Mark Roth listening to frog calls. Coolecting frog calls allows scientists to determine distribution of species.