Illinois Natural History Survey - University of Illinois

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Fold of skin behind head; head less than one-fourth snout-vent length; tympanum absent

 

 

 

 

 

 

No fold of skin behind head; head approximately one-third of snout-vent length; tympanum present

ac_crepita.jpg  hy_avivoca.jpg  hy_cinerea.jpg  hy_chrysos.jpg  ps_crucife.jpg  ps_feriaru.jpg  ps_strecke.jpg  ps_triseri.jpg  

ra_areolat.jpg  ra_blairi.jpg  ra_catesbe.jpg  ra_clamita.jpg  ra_palustr.jpg  ra_pipiens.jpg  ra_sphenoc.jpg  ra_sylvati.jpg

 

 

 

 



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