Hear that annoying, mournful "Woot-WOO-OOT-woot" sound in the trees overhead? That's the Eurasian Collared Dove, which has invaded La Plata County, Colorado, and much of North America. Its nesting season lasts about a year (or at least it seems that way).
Eurasian Collared Doves expanded their range from the Middle East all the way across Europe and were introduced accidentally into the Bahamas in 1974. They soon spread to the Florida mainland and the species is now common across much of North America, as far northwest as Oregon and Washington. They have not yet penetrated the northeastern states, aside from a few records of strays.