College - Author 1

College of Science and Mathematics

Department - Author 1

Biological Sciences Department

Degree Name - Author 1

BS in Biological Sciences



Primary Advisor

Francis X. Villablanca


California condors consume non-food items, including anthropogenic waste, and provision it to their young. Consuming “microtrash” can cause mortality, especially in nestlings. There are several hypotheses explaining why condors might consume microtrash. These hypotheses assume condors exhibit a preference for the type of material. Therefore, we test the assumption that when California condors take microtrash, they display material selectivity. We did this by sampling microtrash from roadside pullouts in the Los Padres National Forest. Those samples were compared to condor necropsy and nest microtrash data, categorized by material type: glass, plastic, metal, and other. We find that in our analysis condors exhibit a preference for plastics and an avoidance of “other” materials (primarily ceramic).

Included in

Biology Commons