Mountain Chickadee (IMAGE) University of Colorado at Boulder Caption Chickadees and nuthatches have been shown to increase the growth of conifers in the West. Credit Photo © Bill Schmoker Usage Restrictions Use by media and websites to illustrate research story 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.