Migration question

[Gary Brower]

Bird nerds . . .

My wife is working on a project (not an academic one!) having to do with migration in the Front Range, and the perils faced by migratory birds (e.g., lights in tall buildings). .

She asked me a question which probably DOES have an answer, but I'm not sure of the best way to find it: “To the best of our knowledge, what species of birds migrate over/through the Front Range?

Is this a question that eBird would answer? BirdCast? Something/someone else?

Any help you can provide would be amazing!

Thanks so much!

Gary Brower (happily having “gotten” Life/State/County Piping Plover today, as well as State/County Burrowing Owl Happy camper!)
Unincorporated Arapahoe County

[David Suddjian]

The easier question might be which of the approx. 500 species recorded in the Front Range region to do not migrate to any degree.  The great majority do. Not a very helpful answer, I know, but most of our birds migrate to some degree. You could discern some of the answer to that question by inspecting eBird bar charts for the Front Range counties, collectively, which would give you a start.

David Suddjian

Littleton, CO

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[Ajit Antony]

I can tell you that all species of raptors migrate along the Front Range. If you go to hawkcount.org and go to the left sidebar and click on Find a Hawk Watch, click on Colorado and then on Dinosaur Ridge Hawk Watch for spring migration, then go back and click on Mount Zion Hawk Watch for the results of an exploratory fall migration there, that my wife Liza and I undertook in Fall 2024. You will see that

17 species of raptors migrate along the Front Range.

Ajit I Antony 

Central Park, Denver

[2mi...@gmail.com]

You might find the Denver bird collision data of interest as well. Denver Parks and Recreation runs the Lights Out Denver program during spring and fall migration. Volunteers patrol a route through downtown Denver every morning from 6-8 a.m. and report on-the-ground findings in downtown Denver to this program office. Lights Out Denver maintains a database of the findings and you can look at the numbers online, including a list of the 93 species identified to date. From their homepage, click the button, "Explore Bird Collision Data." As one of those volunteers for several years, I'd be happy to answer questions about participating in this program. The current season ends on May 30. 

-mike fernandez

Denver

DFO