Esquivel, Carolina, Jorge M. De la O, Steven Sánchez Vargas, Sofía Paniagua, Anthony Esquivel Cambronero, Diego Núñez, and Gabriela Quesada Ávila. 2020. “Anthropogenic Materials Used by Birds to Nest in an Urban Landscape of Costa Rica”. UNED Research Journal 12 (2):e3124. https://doi.org/10.22458/urj.v12i2.3124.