Tree swallows on nest box at Long Point Bird Observatory (IMAGE)

University of Michigan

Tree swallows on nest box at Long Point Bird Observatory

Caption

Although tree swallow populations are declining, this doesn't appear to be because of upticks in mortality, at least for the Long Point flock. Rather, they are having fewer offspring as a result of the declines in insect abundance.

Credit

Brian Weeks

Usage Restrictions

Credit must be given to creator

License

Original 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.