image: Parent gray-headed junco enticing young to leave the nest. Parents hold food away from nest and young come out to get it and this picture captures a young that was just fed out of the nest. This material relates to a paper that appeared in the 20 June 2018, issue of Science Advances, published by AAAS. The paper, by T.E. Martin at U.S. Geological Survey in Missoula, Mont., and colleagues was titled, "Age and performance at fledging is a cause and consequence of juvenile mortality between life stages." view more
Credit: [Credit: T. E. Martin]