FIGURE 1. (A) Oscillogram showing a sequence of five advertisement calls of Bokermannohyla alvarengai from Bar"o de Cocais, Minas Gerais (MG), eastern Brazil (sound archive = CBUFMG-113 (voucher specimen UFMG 14954); air temperature 21 ºC). (B) Spectrogram (upper panel) and respective oscillogram (lower panel) detailing the call highlighted in (A); the bar represents total call duration. (C) Oscillogram showing the higher call rate of a background individual (BI) compared to the focal individual of the recording (FI) (sound archive = CBUFMG-302; from Santana do Riacho, MG; air temperature 18 ºC). (D) An uncollected female in a remnant puddle from a temporary stream next to egg clutches with embryos at different developmental stages. Photo by H. Thomassen