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Shadow & Rainbow Head South


I am continually impressed with the information gathered from tracking devices on birds- remember the study that documented GPS-equipped Bar-tailed Godwits flying nonstop from Alaska to New Zealand?  Or how about the more recent discovery of Black Swift wintering territory in NW Brazil using light-level geolocators?

Currently, Rocky Mountain Bird Observatory is tracking two Osprey on their travels from the mountains of Colorado to warmer climes this fall.  From Jason Beason, RMBO’s Special Monitoring Projects Coordinator:


On June 19th, 2013 biologists from the National Park Service and Rocky Mountain Bird Observatory placed satellite transmitters on two female Osprey near Grand Lake, Colorado. We have been receiving data ever since from Argos (the company that owns the satellites) showing their locations. We named the Osprey “Rainbow” and “Shadow” because they nested at Rainbow Bay on Lake Granby and at Shadow Mountain Reservoir. Shadow began to migrate on September 15th and Rainbow on September 21st. If you are interested in seeing the migration of these two Colorado Osprey please click on the links below:

Click link to view Rainbow’s map:

Click link to view Shadow’s map:

Jason Beason
Special Monitoring Projects Coordinator
Rocky Mountain Bird Observatory

Check it out if you want to do a little armchair migration monitoring.  And if you have a link to another cool migration tracking site leave it in the comments!


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Bill Schmoker

Bill Schmoker

Bill is known in the birding community as a leading digital photographer of birds. Since 2001 he has built a collection of digital bird photos documenting over 640 species of North American birds. His photography has appeared in international nature publications, books, newspapers, interpretive signs, web pages, advertisements, corporate logos, and as references for art works. Also a published writer, Bill wrote a chapter for Good Birders Don't Wear White, is a past Colorado/Wyoming regional editor for North American Birds and is proud to be on the Leica Birding Team. Bill is a Colorado eBird reviewer and is especially fond of his involvement with the ABA's Institute for Field Ornithology and Young Birder Programs. Bill is a popular birding guide, speaker, and workshop instructor, and teaches middle school science in Boulder, Colorado. When he isn’t birding he enjoys family time with his wife and son.
Bill Schmoker

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