Oscillographs (A) and spectrographs (B) for three trill bouts recorded at 00:15 am from captive Xenopus laevis caught in Comines-Warneton, Belgium (water temperature 22 °C). Images by JB.

 
 
  Part of: Pauwels OSG, Brecko J, Baeghe D, Venderickx J, Vanderheyden A, Backeljau T (2023) Morphological, acoustic and genetic identification of a reproducing population of the invasive African clawed frog Xenopus laevis (Anura, Pipidae) recently discovered in Belgium. ZooKeys 1184: 41-64. https://doi.org/10.3897/zookeys.1184.103702