May-Collado, Laura J., Sawyer Bottoms, Grace Durant, Jose David Palacios-Alfaro, and Juan Jose 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 71, no. S4 (October 30, 2023): e57280. Accessed December 21, 2024. https://revistas.ucr.ac.cr/index.php/rbt/article/view/57280.