Although not unprecedented (I don't think), I have a pair of Eurasian collared-doves nesting over my driveway, today Dec 5th. I found some fresh eggshell on the driveway and managed to get a vantage to see the nest. A bird is on the nest (photo in list) with another adult nearby. They also nested in the same nest (pretty sure anyway) in mid-October, which was interesting, but less surprising. Upon discovering the active nest in October, the female dropped off the nest and did a broken wing display in the street. Silly birds.
Scott Somershoe
Littleton, CO