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    Yellowstone

    National Park ID,MT,WY

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  • Craig Pass Closed for the Season; Mammoth to Norris Closed Sept. 14-30

    The road linking West Thumb and Old Faithful is closed for the season—traffic should detour through West Thumb, Lake, and Canyon. The road from Mammoth to Norris is closed for two weeks—traffic should detour over Dunraven Pass. More »

Boreal chorus frog

ndh-yell-6484
A boreal chorus frog calling in Gibbon Meadows.
NPS/N. Herbert
 
Scientific name: Pseudacris triseriata maculata

Identification

  • Adults reach 1 to 1.5 inches in length, and females are usually larger than males; newly metamorphosed juveniles are less than one inch long.
  • Brown, olive, tan, or green (sometimes bi-colored) with a prominent black stripe on each side from the nostril through the eye and down the sides to the groin; three dark stripes down the back, often incomplete or broken into blotches.
Habitat

  • Common, but seldom seen due to its small size and secretive habits.
  • Lives in moist meadows and forests near wetlands.
  • Lays eggs in loose, irregular clusters attached to submerged vegetation in quiet water.
Behavior

  • Breeds in shallow temporary pools or ponds during the late spring.
  • Calls are very conspicuous, resembling the sound of a thumb running along the teeth of a comb.
  • Males call and respond, producing a loud and continuous chorus at good breeding sites, from April to early July, depending on elevation and weather.
  • Usually call in late afternoon and evening.
  • Tadpoles eat aquatic plants; adults mostly eat insects.
  • Eaten by fish, predacious aquatic insect larvae, other amphibians, garter snakes, mammals, and birds.
 

Minute Out In It: Chorus Frogs
Watch and listen to a group of male boreal chorus frogs calling in the Gibbon Meadows, while Ranger Rita Garcia reminisces about discovering them for the first time.

Did You Know?

Summer Crowd at Old Faithful.

At peak summer levels, 3,500 employees work for Yellowstone National Park concessioners and about 800 work for the National Park Service.