Spring Peeper

Pseudacris crucifer

Distinguishing Characteristics

Photo: Derek Yorks

  • Smallest frog in Maine, approximately 0.8 to 1.5 inches in length
  • Grayish- or orangish-brown above with distinct dark “X” on back
  • Underside yellowish or grayish white
  • Smooth skin
  • Commonly confused with gray treefrog
  • Breeding call is a high-pitched “peep”

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Status and Distribution in Maine

  • Common and secure
  • Statewide

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  • Forested areas near ponds, marshes, and swamps
  • Arboreal, found on trees and shrubs

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  • Eats a wide variety of invertebrates including insects, snails, and spiders

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Seasonal Changes

  • Partially freeze tolerant; overwinters in the forest floor

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Natural History Notes

  • One of only two tree-dwelling frogs in Maine (with gray treefrog)
  • Can change color to closely match background substrate

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Share Your Sighting

There is much still to learn about the distribution and ecology of Maine’s herpetofauna, and we encourage members of the public to share their photo-documented observations as part of the Maine Amphibian & Reptile Atlas Project (MARAP).

To see if a township still needs documentation of a species, consult this distribution map (PDF). If a township lacks a photo or specimen record, we want your observation!

There are two ways to share your observations:

Submit your reptile or amphibian observation online

No service? No problem. Click here to download the survey to your device while connected, then take offline to collect observations from anywhere. Tip: The survey works best on Google Chrome and Safari.

Or upload sightings to the iNaturalist citizen science project through their website at iNaturalist.org or mobile app.

  1. When submitting an observation through iNaturalist add a description of the location (and other noteworthy information) to the “notes” field. This serves as a check on the locations automatically generated by smartphone cameras, which may be imprecise if cell service or GPS coverage is weak.

Thank you for doing your part to help conserve Maine’s reptiles and amphibians.