finely granular. In appearance they are more slender than H. versi- 

 color, and when dark brown as we first saw them they reminded us 

 strongly of Hyla femora/is. 



Structure: More slender than Hyla versicolor; muzzle truncate; 

 webs large, but leaving the last two joints of fourth toe free, except 

 for web margin; back almost smooth; ventral surface with distinct 

 granulations; usually with narrow waist; male with folds on rear of 

 throat almost to pectoral region. 



Voice: "The voice is bird-like, being a plaintive whistle repeated 

 in quick succession, much as in the red-bellied woodpecker. This call 

 is sometimes preceded by a few notes of a slower call much like the 

 voice of Hyla crucifer." (Viosca, 1928, p. 90). The swollen throat 

 vibrates for 6-10 or 12 calls. 



Breeding: They breed from June to mid-August. The eggs and 

 tadpoles are not described. "Hyla avivoca is more clearly related to 

 Hyla versicolor than to any other North American Hyla. ..." 



Notes: "The pitch and tone of the voice of avivoca is nearer to that 

 of crucifer than to any other eastern American Hyla although its rate 

 is far more rapid than that o{ crucifer." (Viosca, 1928, p. 91). 



June, 1930. 1 mistook the first calls I heard for those of the Pileated 

 Woodpecker. 



June 11, 1930. Tick Faw River, La. (near Ferry). In Tick Faw 

 River we heard a few H. avivoca. Finally Chase called me to hurry and 

 started off on the run. I followed. We were soon in a tupelo swamp. 

 Near the edge we heard them. Chase found his first one crosswise of 

 leaves of buttonbush {Cephalanthus occidentalis). My first was on the 

 bole of a gum. Many of Chase's captures were head down on upright 

 branch of buttonbush. Mine were head up. Chase and I followed 

 voices. We got five frogs between us. Viosca with a lamp on his head 

 shone their eyes. He didn't follow voices so much. He got more in this 

 way than either of us. One frog was pure green with no markings. 

 Viosca found several on small gums near the tupelo edge while 

 Chase's and my captures were farther in the swamp. On the trees was 

 some poison ivy. On clumps or tree bases in the swamp and at the 

 edge of the swamp were sensitive fern (Onoclea sensibilis), royal fern 

 (Osmunda regalis), Utricularia (purple), a marsh St. John's Wort, 

 sphagnum, water penny (Hydrocotyle), lizard's tail (Saururus), 

 Nyssa aquatica and button bushes with mayhaws. Most of the frogs 

 were 3 or 4 feet above the water. Finally Chase found a female on a 

 log, in the water. Sometimes they go higher in trees. Usually they are 

 down at 3-4 feet or less. Their call is bird-like. It is a fine delicate 

 little species. Viosca did right to call it a new form, H. avivoca. 



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