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Abstract: Pudu puda is a very small deer that inhabits humid areas of the temperate forests in Chile and Argentina and is one of the less known South American deer. We provide an updated distribution of Pudu puda in Argentina, with eoreferenced sighting localities, and some qualitative features of its habitat such as forest type and understory. We also analyse the effects of human settlements, cattle and invasive mammals (Cervus elaphus and Sus scrofa) on the distribution of the southern pudu. We obtained information on Pudu puda occurrence from unpublished sources including protected areas provided by National Parks Administration and interviews of local residents. In the north sector of Nahuel Huapi National Park, where high density of records was found, we obtained information about some qualitative habitat features, proximity of Pudu puda sighting localities to human settlements, presence of invasive mammals and cattle. We recorded a total of 54 new localities for Pudu puda in Argentina, the northernmost record at S 39°23', W 71°17' and the southernmost at S 42°58', W 72°00'. We recorded low frequency of human settlements, Sus scrofa and Cervus elaphus in Pudu puda sighting localities. We did not detect exclusion of Pudu puda from areas with cattle occurrence. Sighting localities of southern pudu were made mostly in monotypic mature Nothofagus dombeyi forest, with dense understory dominated by Chusquea coleu.