[cobirds] Nocturnal migration, Oct. 3rd, Boulder County

Hello, Birders.

At Greenlee Preserve, Boulder County, during the 5am hour this morning, Thursday, Oct. 3rd, I heard and audio-recorded a light but steady passage of calling White-crowned Sparrows. If you're interested, their flight calls look like this: http://tinyurl.com/WCSp-Greenlee

After sunrise, I heard and saw a few Barn Swallows; cf. Leatherman's earlier ponderings.

Ted Floyd

Lafayette, Boulder County, Colorado