Amplitude (above) and frequency (below) of Baird’s tapir (Tapirus bairdii) whistles during courtship behaviour in an aguada of the Calakmul Biosphere Reserve, southern Mexico [See also Suppl. material 4: Video of Baird’s tapir (Tapirus bairdii) males whistling when following a female in an aguada of the Calakmul Biosphere Reserve, southern Mexico].

 
 
  Part of: Reyna-Hurtado R, Huerta-Rodríguez JO, Rojas-Flores E (2025) Extreme fighting and vocalisations in Tapirus bairdii: observations from aguadas of Calakmul, social arenas for the species. Neotropical Biology and Conservation 20(1): 67-78. https://doi.org/10.3897/neotropical.20.e143760