These doves (Streptopelia decaocto) invaded North America in the '80s.
It did not take them long to occupy habitat as pests all the way to
Alaska; see
http://blog.nature.org/science/2014/02/18/eurasian-collared-dove-bird-count/
.  I wrote an article in fall 2007 issue of The Ohio Cardinal (online at
<http://ohiobirds.org/the-ohio-cardinal-archived-issues/> ) about this
species and its inevitable occurrences in 0hio.
        These doves are not comfortable with rough terrain. The  article hinted
at the possibility that the Appalachians might thwart their occupation
of Ohio, even while their spread continued northwest from Florida.
Certainly they are not found everywhere here, as they are in many other
states, and their numbers seem to be quite modest by comparison. They
are regarded as a plague in many places in North America, but here we
seem to be sheltered enough by the mountains and hill country between
here and Florida as they spread northwest.
        These are not native birds, but if you want you can count them just
like starlings. I think we are lucky to have a modest population that
seems to be stable for the time being.
Bill Whan
Columbus



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