Yellow warbler by strawberry field (IMAGE) University of California - Davis Caption A yellow warbler is held by a researcher. A study shows natural habitat around farms can mute the effects of birds on crops. Credit Daniel Karp/UC Davis Usage Restrictions Provide credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.