lower Río Negro, southern Buenos Aires, Argentina.
Previously placed in genus Pterocnemia, on basis mainly of tarsal scutellation and feathered upper tarsus, but genetic studies reveal close relationship with R. americana, and probably more aptly considered congeneric#R#R; has hybridized with R. americana in captivity. Normally considered conspecific with upland R. tarapacensis but#R#R differs in having 16–18 vs. 8–10 tarsal scutes (3), longer legs (allow 2), greyer upperparts (1) and less dense white spots near front edge of “skirt” (1); appears also to intergrade or to be parapatric with R. pennata in Mendoza province, Argentina (possible score 2 or 3), but on other hand plumage variable with age and breeding condition#R; more research needed. Monotypic.
S Chile and WC to S Argentina (S Mendoza S to Strait of Magellan).
Introduced to N Tierra del Fuego.
Food and feeding
Status and conservation
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