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Idaho Frogs and Toads: Pictures & ID Guide

Last checked November 3, 2026 against official sources.

On this page
  1. All 10 frogs and toads
  2. Lookalikes
  3. When they are active
  4. How to report
  5. About this list
  6. Sources

This page lists 10 species: all from Idaho Department of Fish and Game's Idaho Species Catalog, Amphibia Class. 1 is nonnative.

All 10 frogs and toads

From A to Z.

American Bullfrog
Photo: Paul Danese · CC BY-SA 4.0 · Wikimedia Commons · resized

American Bullfrog

Lithobates catesbeianus

Not stated Nonnative

Venom
No official source we use states whether this animal is venomous. That does not mean it is harmless: do not handle it.
Size
Usually 6 to 8 inches long (NCWRC); can reach 8 inches or more and weigh over 2 pounds (CDFW). Missouri gives 3.5 to 6 inches snout to vent, occasionally to 8.75.
How to recognize it
  • No ridge (dorsolateral fold) down each side of the back
  • Large round eardrum: about twice the eye in males, about eye-sized in females
  • Fully webbed hind feet, longest toe extends past the webbing
Conservation
No IDAPA classification shown; State Conservation Rank SNA

Full American Bullfrog guide

No confirmed photo of Boreal Chorus Frog

Boreal Chorus Frog

Pseudacris maculata

Not stated

Venom
No official source we use states whether this animal is venomous. That does not mean it is harmless: do not handle it.
Conservation
IDAPA classification: Protected Nongame; State Conservation Rank S3
No confirmed photo of Columbia Spotted Frog

Columbia Spotted Frog

Rana luteiventris

Not stated

Venom
No official source we use states whether this animal is venomous. That does not mean it is harmless: do not handle it.
Conservation
IDAPA classification: Protected Nongame; State Conservation Rank S4
Great Basin Spadefoot
Photo: RJ Baltierra · CC BY 4.0 · iNaturalist

Great Basin Spadefoot

Spea intermontana

Not stated

Venom
No official source we use states whether this animal is venomous. That does not mean it is harmless: do not handle it.
Conservation
IDAPA classification: Protected Nongame; State Conservation Rank S3
Northern Leopard Frog
Photo: Colin Croft · CC BY 4.0 · iNaturalist

Northern Leopard Frog

Lithobates pipiens

Not stated

Venom
No official source we use states whether this animal is venomous. That does not mean it is harmless: do not handle it.
Conservation
IDAPA classification: Protected Nongame; State Conservation Rank S2
No confirmed photo of Rocky Mountain Tailed Frog

Rocky Mountain Tailed Frog

Ascaphus montanus

Not stated

Venom
No official source we use states whether this animal is venomous. That does not mean it is harmless: do not handle it.
Conservation
IDAPA classification: Protected Nongame; State Conservation Rank S3
No confirmed photo of Sierran Treefrog

Sierran Treefrog

Pseudacris sierra

Not stated

Venom
No official source we use states whether this animal is venomous. That does not mean it is harmless: do not handle it.
Conservation
IDAPA classification: Protected Nongame; State Conservation Rank S3
No confirmed photo of Western Toad

Western Toad

Anaxyrus boreas

Not stated

Venom
No official source we use states whether this animal is venomous. That does not mean it is harmless: do not handle it.
Conservation
IDAPA classification: Protected Nongame; State Conservation Rank S3
Wood Frog
Photo: Jackson Kusack · CC0 1.0 · iNaturalist

Wood Frog

Lithobates sylvaticus

Not stated

Venom
No official source we use states whether this animal is venomous. That does not mean it is harmless: do not handle it.
Size
Adults 1.5 to 2.75 inches snout to vent, occasionally to 3.5 inches; females are larger than males.
How to recognize it
  • Dark eye mask: SREL calls it the only frog in the Southeast with such a facial pattern
  • Distinct ridge of skin (dorsolateral fold) down each side of the back to the groin
  • Call: a rapid, hoarse 'waaaduck' like a quacking duck, repeated three or four times
Conservation
IDAPA classification: Protected Nongame; State Conservation Rank SQ

Full Wood Frog guide

No confirmed photo of Woodhouse's Toad

Woodhouse's Toad

Anaxyrus woodhousii

Not stated

Venom
No official source we use states whether this animal is venomous. That does not mean it is harmless: do not handle it.
Conservation
IDAPA classification: Protected Nongame; State Conservation Rank S2

Frogs and Toads people confuse

Wood frog or Columbia spotted frog (Alaska)?

Wood frog
Photo: Jackson Kusack · CC0 1.0 · iNaturalist

Wood frog Not stated

No confirmed photo of Columbia spotted frog (Alaska)

Columbia spotted frog (Alaska) Not stated

ADF&G: slightly bumpy skin covered with irregular black spots and salmon-red undersides of the legs and belly; in Alaska it is mostly confined to Southeast river corridors. The wood frog has a dark eye mask and a light lip line and a uniformly cream underside.

Photos show typical adults; individuals vary. Never get close to compare.

When frogs and toads are active in Idaho

Records of frogs and toads in Idaho peak in May to July. They show when people record frogs and toads, not how many there are (about month bars).

256 records of frogs and toads in Idaho by month (GBIF, CC0 and CC BY records).

How to report

Invasive species: Idaho Invasive Species Hotline 1-877-336-8676 (ISDA). Wildlife crimes: Citizens Against Poaching 1-800-632-5999 (IDFG). Bear sightings and conflicts: report to the state wildlife agency (IDFG regional offices). Idaho State Department of Agriculture

About this list

The species list comes from Idaho Species Catalog, Amphibia Class (In Idaho? = Yes) (Idaho Department of Fish and Game, 2017 (Internet Archive capture 2017-05-02)).

Venom labels come only from official sources and link to them; "Not stated" never means harmless. How labels work.

"Nonnative" and "Invasive" follow the wording of the source list. See invasive species in Idaho.

Sources

  1. About Fish and Game. Idaho Department of Fish and Game. archived copy, captured September 23, 2026; checked November 3, 2026.
  2. Idaho Species Catalog: Amphibia Class (In Idaho? = Yes). Idaho Department of Fish and Game. archived copy, captured May 2, 2017; checked November 3, 2026.
  3. Invasive Species / Pests / Invertebrates. Idaho State Department of Agriculture (Invasive Species of Idaho program). undated page; checked November 3, 2026.
    Quoted passages (1)
    “Idaho Invasive Species Hotline [toll-free]: 1-877-336-8676”
  4. GBIF.org occurrence records, human observations licensed CC0 1.0 or CC BY 4.0 only, accessed November 3, 2026. The datasets behind these counts are listed on our Sources page.