Subscribe
Subscribe
MY AMERICAN SCIENTIST
LOG IN! REGISTER!
SEARCH
 
Logo IMG
HOME > My Amsci > Restricted Access

Marking Loons, Making Progress



Restricted Access The content you've requested is available without charge only to active Sigma Xi members and American Scientist subscribers.


If you are an active member or an individual subscriber, please log in now in order to access this article.

If you are not a member or individual subscriber, you can:



Abstract:

2011-05PiperF1.jpgClick to Enlarge ImageCommon the common loon may be, but it’s behavior remained enigmatic until the emergence of bird-marking techniques that have now begun to yield long-term findings. Almost two decades reveal that loons do not mate for life, as so long supposed, that breeding pairs may be intruded upon by both male and female invaders, and that territorial fights between males can lead to fatalities 30 percent of the time. In fatal fights, the invader is always the victor. Sonogram studies reveal that the signature of these territorial birds, their yodel, is both characteristic of individuals yet also changes as their physical state and circumtances change.


Subscribe to American Scientist