I have a singing male Chestnut-sided Warbler in my backyard this morning. Quite the surprise when putting out the trash this morning.
I first heard it sing at about 7:10 and it is still singing in the same trees as of 8:00am. Recorded audio of the bird, and submitted an eBird checklist for it as well. In NW Longmont, near Garden Acres Park.
Great way to wake up!
Bryan Guarente
Meteorologist/Instructional Designer
UCAR/The COMET Program
Boulder, CO