add a COMPASS to your water-bird kit

May 9, 2008
houston tx
Interesting article using photography and other techniques to analyze how flocks of birds land on water---without collisions!

They found that water birds land along the local magnetic field. So if you want to catch birds landing across (l/r to you) your field of view, set up perpendicular to the Earth's magnetic field. That setup won't get as clear a view of straight-on landing shots.

It might also work with open fields, but breaks down among shrubs and branches.
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