Dec 06 2007

Finding Out Where the Eagles Fly

Published by at 10:31 pm under Birds of Prey,Migration

Golden Eagle (photo by Todd Katzner)Last night I went to Three Rivers Birding Club to hear Dr. Todd Katzner of the National Aviary give an excellent presentation on "Migrating Eagles and Wind Turbines: Resolving Conflict in an Information Void."   The project is a multi-year study of the migratory paths of eastern golden eagles.  Its goal is to provide information so that wind turbines can be sited properly and not cause bird mortality.

Wind energy is being heavily promoted and developed in Pennsylvania.  I’m sure you’ve seen windmills if you’ve driven east on the Turnpike.  Many more wind farms are planned.

Some wind turbines are highly lethal to birds.  Some don’t kill any.  It turns out that turbine placement is the key.  If we find out where the birds usually fly, the turbines can be placed outside that path.  Sometimes only a few hundred feet makes all the difference.

The coolest part of the project is the telemetry data and maps.  It’s impressive how far golden eagles travel in a day (more than 200 miles) and how fast they go when the wind is good (60 miles per hour!).  On the Aviary website you can see where all seven eagles have been and you can watch the day-by-day movements of each eagle

The project needs to tag more eagles with telemetry units but the units are expensive.   The Aviary and their partners are working at raising funds to buy telemetry units.  Contact Dr. Todd Katzner at the National Aviary if you wish to help.

One response so far

One Response to “Finding Out Where the Eagles Fly”

  1. Daveon 07 Dec 2007 at 9:26 am

    We have Todd scheduled for a meeting of the Juniata Valley Audubon this spring, so I’m glad to hear he gives a good presentation. You might be interested in a post I did about the telemetry project: here. Also, both of my mother’s Game News columns on the topic are online at

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