A male Rana kauffeldi emitting its primary (advertisement) call in foreground with several other males calling in background (along with high-pitched Pseudacris crucifer).
Citation: Feinberg JA, Newman CE, Watkins-Colwell GJ, Schlesinger MD, Zarate B, et al. (2014) Cryptic Diversity in Metropolis: Confirmation of a New Leopard Frog Species (Anura: Ranidae) from New York City and Surrounding Atlantic Coast Regions. PLoS ONE 9(10): e108213. doi:10.1371/journal.pone.0108213
To read the full article: http://dx.plos.org/10.1371/journal.po...