Spectrograms and oscillograms of the advertisement call of Hyloxalus sp. (ZSFQ 4442, SVL 15.45 mm, 16.5 °C air temperature, 66% relative humidity). A complete advertisement call B detail of a note with upward modulation C detail of a note with downward modulation. Spectrogram obtained using the Hann window at 99% overlap, 256 samples of FFT size and 3 dB filter bandwidth of 248 Hz.

 
 
  Part of: Batallas D, Márquez R, Guayasamin JM (2025) Sounds of the northern Andes: the calls of a diverse and endangered frog community (Amphibia, Anura) from Ecuador. ZooKeys 1224: 211-252. https://doi.org/10.3897/zookeys.1224.137972