/* */ Habitat Project: Calling Frog Survey - Chicagoland Frogs

Calling Frog Survey: Chicagoland Frogs

Wood Frog
Rana sylvatica
  • markings:
    • medium
    • brown/tan
    • dark eye mask
  • call: chirdicks, chorus - raspy quack

Western Chorus Frog
Pseudacris triseriata
  • markings:
    • small
    • 3 stripes on back
    • Black eye mask
    • March-May
  • call: like finger over top of comb

Spring Peeper
Pseudacris crucifer
  • markings:
    • small
    • X on back
    • March-May
  • call: high pitched “peep” chorus - sleigh bells

Northern Leopard Frog
Rana pipiens
  • markings:
    • medium
    • green w/dark circular spots
    • white lateral folds unbroken
  • call: soft course snore w/chuckle

Plains Leopard Frog
Rana blairi
  • markings:
    • green w/dark spots circular spots
    • white lateral folds broken near groin
    • SE & Will County
  • call: low chirks & snores

Pickerel Frog
Rana palustris
  • markings:
    • cream w/square spots
    • very rare - spring fed stream, fen or seep habitat
  • call: ticking snore “yeow”

American Toad
Bufo americanus
  • markings:
    • 1-2 warts per spot
    • large gland behind eye, unattached to bony crest, unless by a short spur
  • call: 10-30 second melodious trill

Eastern Gray Tree Frog
Hyla versicolor
Cope's Gray Tree Frog
Hyla chrysoscelis
  • markings:
    • lichen pattern (gray or green)
    • light patch below eye
    • yellow inner thighs
  • call: Eastern - musical trill
           Cope’s - fast harsh trill

Fowler's Toad
Bufo fowleri
  • markings:
    • 3 or more warts in large spot
    • large gland touches bony crest
    • sand habitat
  • call: distressed sheep

Cricket Frog
Acris crepitans
  • markings:
    • small
    • triangle patch between eyes
    • warts
    • very rare near Chicago area
  • call: clanking marbles

Green Frog
Rana clamitans
  • markings:
    • large
    • green to brown
    • lateral folds 2/3 of body
  • call: banjo “gung”

Rana catesbeiana
  • markings:
    • large
    • green to brown
    • lateral fold to ear
  • call: deep “br-wum”

Download Windows Media Player or Apple QuickTime Player to play frog calls .mp3 audio files if your PC doesn't play these calls.

Frog Calls are from the "Frogs and Toads of the Chicago Region" CD available to monitors for the Calling Frog Survey. The calls were provided by Lang Elliot, Nature Sound Studio.

PDFs to use for Visual Identification of Chicagoland herps:

Use these links for more information about frogs: