University of Washington researcher Julia Parrish founded COASST, a nonprofit that allows hundreds of citizens to serve science by cataloging dead birds on West Coast beaches.
Biologists seek to "do no harm," improve island health, get rid of human-introduced predators and untangle complex relationships that developed on the fly.
Professor Shigeru Watanabe from Keio University in Japan, writing in the journal Animal Cognition, says pigeons can use color, pattern and texture to distinguish good paintings from bad.