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posted on 11.11.2014, 22:20 by Jeremy A. Feinberg, Catherine E. Newman, Gregory J. Watkins-Colwell, Matthew D. Schlesinger, Brian Zarate, Brian R. Curry, H. Bradley Shaffer, Joanna Burger

Rana kauffeldi with high-pitched Pseudacris crucifer in background. Several males emitting primary (chuck) call. Note R. kauffeldi secondary (groan) call between seconds 4 and 8 of the recording. Audio converted from video taken by JAF in Putnam County, New York. (From PLOS Supporting Information Video S1)

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