Protti-Sánchez, Francesca, and Luis Sandoval. “Changes in Nesting Sites Abundance and Their Use by Woodpeckers Along an Urban Gradient: A Ten-Year Comparison”. Revista de Biología Tropical 67, no. S2 (April 1, 2019): S274–S281. Accessed May 5, 2024. https://www.revistas.ucr.ac.cr/index.php/rbt/article/view/37241.