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Message: <blockquote data-quote="pbjosh" data-source="post: 3930407" data-attributes="member: 117939">For anyone interested, I did some looking into where the break between magellanica and paraguaiae occurs in Argentina. I don't yet have access to the paper, but looking at records and recordings and the biogeographic boundaries, it seems to be:In all of Chile, and all of Argentine Patagonia, up to and including the provinces of Rio Negro and Neuquen, you have magellanica. I believe magellanica continues up along the base of the Andes are far north as the city of Mendoza, more or less.East of the Andes from Colombia and Venezuela south to the southernmost extent of the Chaco and Pampa biomes in Argentina, you have paraguaiae. IE, the provinces of Cordoba, Santa Fe, Entre Rios, and at least most of Buenos Aires province, should all be paraguaiae.Thus the break between the two looks to be the division of the moister/warmer chaco and pampa from the patagonian steppe / monte, which occurs roughly along a line drawn between the cities of Mendoza and Bahia Blanca.I am not certain where exactly the break occurs along the Atlantic coast. I believe birds in N Buenos Aires province, at least in breeding season, should safely be paraguaiae. But around Bahia Blanca, I am not certain. If anyone sees errors with this please do correct me - I'm not purporting to be an expert on the matter, I was just curious and spent an hour or so poking around ML, XC, and eBird looking at substantiated records and seeing what I could figure out.</blockquote>

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