Produced by Heath Galiwango, Sabrina Sutton, & Vanessa Wong

In this podcast episode, three UCLA students explore the complex relationship between humans and one of the world's most familiar birds: the house sparrow. What begins as a simple question, are sparrows pests, unfolds into a discussion of ecology, history, politics, and human behavior. The episode examines two major historical case studies involving sparrows. First, the hosts discuss China's Four Pests Campaign during the Great Leap Forward, where millions of sparrows were exterminated after being blamed for crop losses, contributing to devastating ecological consequences. The conversation then shifts to 19th-century America, where house sparrows were intentionally introduced from Europe and initially celebrated before later being labeled invasive pests. Drawing from scientific literature and interviews with avian researchers, the hosts explain the biological traits that have made house sparrows so successful, including their adaptability, reproductive flexibility, and close association with human environments. The episode also explores the ecological, agricultural, and social impacts of sparrows while examining how language surrounding invasive species can reflect broader ideas about belonging and exclusion. By combining science, history, and ethics, the episode encourages listeners to reconsider what it means for a species to be labeled a "pest." Special thanks to Dr. Michelle Rensel (UCLA) and Dr. Andrea Liebl (University of South Dakota) for taking time to sit down with us and share their expertise on house sparrows.

Pests and Prejudice is a podcast series created by UCLA undergraduates in the spring of 2026. Each episode is a story of a messy relationship, one in which people seduced pests, and then decided to break up with them... and it usually goes about as well as you would expect...