Indiana University

Skip to:

  1. Search
  2. Breadcrumb Navigation
  3. Content
  4. Browse by Topic
  5. Services & Resources
  6. Additional Resources
  7. Multimedia News

Brilliant Image

Dark-eyed Junco Nestlings

Photo by: Joel McGlothlin

Print-Quality Photo

These dark-eyed Junco nestlings may not receive equal time from each of their parents. A study by IU Bloomington biologist Ellen Ketterson showed that aggressive, testosterone-laden males spend less time doting on their young... and more time chasing potential mates