From personal experience, Eurasian collared doves do indeed appear to have displaced native doves in certain areas. My own observations from the area around Fernandina Beach, FL, back in the 90s, was that no mourning doves were around, yet there were dozens of collared doves in the area where our research vessel was ported, a mile inside the sea buoy. (The extreme northeastern corner of Florida.) These were actually my "lifer" Eurasian collared doves. (I count them - personal rules.) I found this interesting, since mourning doves were present in other fairly nearby locations, down closer to Jacksonville, in Duval County. I was left with the impression that the two species do not really coexist well, although I have no quantitative data to back that up, only qualitative personal impressions. Perhaps when a local population of collared doves becomes well-established it does not bode well for nearby mourning doves. Bob Evans Geologist, etc. Hopewell Township, Muskingum County On Wed, Dec 21, 2016 at 4:04 PM, Kathi Hutton <[log in to unmask]> wrote: > Steve: > The House Sparrow vs bluebird comparison is a no-brainier, as HOSP > aggressively compete with bluebirds for nesting cavities. According to the > link in the original post, ECDO were not thought to be negatively affecting > native species. That article was from 2014, so things may have changed > since. > > Curiously, > Kathi > > Sent from iVan II, my iPhone > ______________________________________________________________________ > > Ohio-birds mailing list, a service of the Ohio Ornithological Society. > Please consider joining our Society, at www.ohiobirds.org/site/ > membership.php. > Our thanks to Miami University for hosting this mailing list. > > > You can join or leave the list, or change your options, at: > listserv.miamioh.edu/scripts/wa.exe?LIST=OHIO-BIRDS > Send questions or comments about the list to: [log in to unmask] > ______________________________________________________________________ Ohio-birds mailing list, a service of the Ohio Ornithological Society. Please consider joining our Society, at www.ohiobirds.org/site/membership.php. Our thanks to Miami University for hosting this mailing list. You can join or leave the list, or change your options, at: listserv.miamioh.edu/scripts/wa.exe?LIST=OHIO-BIRDS Send questions or comments about the list to: [log in to unmask]