Fig. 4 Relationship of plastic ingestion and nesting behavior. Relationship of plastic ingestion and nesting behavior. Colored circles and horizontal lines represent the mean and 95% CIs for each species’ model-predicted plastic ingestion frequency. Vertical dashed lines are model-predicted mean plastic ingestion frequency for each group (burrow- and surface-nesting). Vertical dotted lines represent the 95% CIs of the plastic ingestion frequency for each group. Matthew S. Savoca et al. Sci Adv 2016;2:e1600395 Copyright © 2016, The Authors