How did this bird, a native of Europe and Asia, and one that was never officially introduced as a game species, meet its end on a dusty southern plains stock tank? Apparently the Eurasian collared dove was purposely introduced to the Bahamas sometime in the 1970s, and from there it hopped over to Florida, or, as I like to call it, the Ellis Island of invasive species. Then it began a slow, but inexorable march west. Ten years ago, at least in these parts, collared doves were mostly a bird of the urbs and burbs. They were a novelty at backyard feeders and you'd rarely see them away from towns. But no more. In the past few years they've begun showing up in hunters' bags more and more often. Last year, on a Kansas pheasant hunt, I saw literally hundreds of them around grain elevators and feed fields.