Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

The Detection of Bird Migration by High-Power Radar

J. G. Tedd and D. Lack
Proceedings of the Royal Society of London. Series B, Biological Sciences
Vol. 149, No. 937 (Dec. 24, 1958), pp. 503-510
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/83196
Page Count: 9
  • Read Online (Free)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Detection of Bird Migration by High-Power Radar
Preview not available

Abstract

The new and more powerful R.A.F. 10 cm radar sets frequently detect 'angels' to ranges exceeding 60 miles from the station. The seasons and times of day of their occurrence, their speed in relation to the wind, their directions of movement, and the influence of the weather, all fit the view that such echoes come from migrating birds, especially passerine birds. At a Norfolk station, the heaviest activity occurred eastwards in March and April, with a peak around 22.00 h G.M.T., and west-south-west in October and November, with peaks around 22.00 h and 10.00 h G.M.T.

Page Thumbnails

  • Thumbnail: Page 
503
    503
  • Thumbnail: Page 
504
    504
  • Thumbnail: Page 
[unnumbered]
    [unnumbered]
  • Thumbnail: Page 
505
    505
  • Thumbnail: Page 
506
    506
  • Thumbnail: Page 
507
    507
  • Thumbnail: Page 
508
    508
  • Thumbnail: Page 
509
    509
  • Thumbnail: Page 
510
    510