Wood Frog
Lithobates sylvatica

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

Western Chorus Frog
Pseudacris triseriata

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

Spring Peeper
Pseudacris crucifer

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

Northern Leopard Frog
Lithobates pipiens

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

Plains Leopard Frog
Lithobates blairi

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

Pickerel Frog
Lithobates palustris

  • markings:
    • cream w/square spots
    • very rare – spring fed stream, fen or seep habitat
  • call: ticking snore “yeow”
Pickerel FrogPicture by Lalainya Goldsberry

American Toad
Anaxyrus 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
American Toad

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
Cope's Grey Tree Frog Cope’s Grey Tree Frog

Fowler’s Toad
Anaxyrus fowleri

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

Cricket Frog
Acris crepitans

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

Green Frog
Lithobates clamitans

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

Bullfrog
Lithobates catesbeiana

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

Unless otherwise noted above, all photographs were taken by Joe Cavataio and are used with permission.


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


To download a list of frog calls for your personal reference on your computer, mp3 player or smartphone, please click here.

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.