Union Co., Illinois. May 5, 1996.
On most nights in May and June the frog chorus is in full force down in the La Rue Scatters, along Snake Road. Green treefrogs dominate with their overlapping rounds of queenk queenk. Gray treefrogs chatter up in the willows and tupelos, and underneath the banjo plucks of green frogs is the bullfrog’s throaty bellow. And somewhere out there in the dark, ten feet or a hundred yards away, a lone avivoca calls – seep-seep-seep. A creature of wooded swamps, the bird-voiced treefrog is now protected in Illinois, where it occurs in a few of the southern counties where habitat persists. Removed from the synonymy of Hyla by Duellman, Marion, and Hedges, 2016, Zootaxa, 4104: 10
HerpMapper records for this species are here.