Strecker's Chorus Frog vs. Spring Peeper

Both are early-spring callers; they meet in Arkansas, eastern Oklahoma and Texas (records share 7 one-degree squares). A: Irregular dark spots in the Strecker's Chorus Frog; a dark X between the shoulders in the Spring Peeper. B: A bold dark mask through the eye and a dark spot below it in the Strecker's Chorus Frog; no bold mask and no spot below the eye in the Spring Peeper. C: Stout, with thick forearms in the Strecker's Chorus Frog; slim, with thin forearms and larger toe pads in the Spring Peeper.

Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.

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