Streptopelia decaocto By Matt Young May 22, 2023 11:00 MST Streptopelia decaocto – Eurasian collared dove, Elmer's Two-Mile Creek, Boulder, Colorado, 27 April 2023. It seemed kind of late in the season, but these doves were acting kind of, well, lovey-dovey, so I pruriently snapped their picture. The collared doves have colonized the city, and (as I have noted earlier) I no longer see nor hear mourning doves, Zenaida macroura, within the city limits.