Image: Angelstar Creations small banner
My Writings

Study guide for use in my Blue Planet, Environmental Science Class, page 15

Image: Tracks of free-flying birds - angelstar creations

Cochran, W. W., Mouritsen, H., & Wikelski, M. (2004).  Migrating Songbirds Recalibrate Their Magnetic compass Daily from Twilight Cues. Science, 304(5669), 407.

What it says: Fig. 2. Tracks of free-flying (A) gray-cheeked thrushes and (B) Swainson's thrushes. Arrows indicate the direction and ground track of flights if the flights were conducted under no-wind conditions (22). Data are depicted differently in (A) and (B) because for gray -cheeked thrushes experimental and control birds are different individuals. Whereas in Swainson's thrushes the same experimental individuals were followed for ar least two successive nocturnal migrations (because o the large spread in natural headings) (Fig. 1). Connected arrows show flights of the same individual during successive nights. Arrows depict natural migratory flights in black; experimental birds for which the magnetic field was turned east before takeoff, red; subsequent night flights of experimental birds, yellow; and experimental birds that did not migrate on the night o magnetic treatment but did so 1 to 6 days later, white. Broken lines indicate that birds were lost during tracking at the site where the broken lines start.

FAIR USE NOTICE: This page may contain copyrighted material the use of which has not been specifically authorized by the copyright owner. This website distributes this material without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes. We believe this constitutes a fair use of any such copyrighted material as provided for in 17 U.S.C ยง 107.

NOTE TO AUTHORS: If you are the author of this article/images/photos and do not wish to have this posted on the website, please write to me at my email address or mailing address on my contact page, and I will remove it or any part thereof. Please mention the URL of the page which you want to bring to my attention. This is a personal Web site for educational purposes only. ~

Back to Geography Page