May-Collado, L. J., S. Bottoms, G. Durant, J. D. Palacios-Alfaro, and J. J. Alvarado. “Southern Hemisphere Humpback Whales (Megaptera Novaeangliae) (Artiodactyla: Balaenopteridae) Singing Activity at Caño Island Biological Reserve, Costa Rica Before, During, and After COVID-19 Lockdowns”. Revista De Biología Tropical, vol. 71, no. S4, Oct. 2023, p. e57280, doi:10.15517/rev.biol.trop. v71iS4.57280.