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Up to 10 news species of North American crossbill? (1 Viewer)

Very interesting article. 10 new species of crossbill, what a wonderful thing that would be! Drive the competitive lister crazy of course. . .. ;)
 
Very interesting article. 10 new species of crossbill, what a wonderful thing that would be! Drive the competitive lister crazy of course. . .. ;)
Or anyone who visited the area and just noted down "Red Crossbill" without adding observational details... something which I've been guilty of with other species that were later split...
 
Or anyone who visited the area and just noted down "Red Crossbill" without adding observational details... something which I've been guilty of with other species that were later split...

Even detailed notes wouldn't be enough since according to the article the call types are only reliably distinguishable by spectrograph. If and when the splits occur, I imagine the listing fraternity will come up with someway to cope. Competitive listing's just a hobby after all, and as such the rules can be as ad hoc and arbitrary as necessary to keep things moving along smoothly. Me, as an amateur of evolutionary theory and (nowadays) a very lukewarm lister, I just glory in the sheer biological interest of the situation.
 
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