Update birds list of Santiago del Estero, Argentina

This paper presents an update to the bird list of Santiago del Estero province (Argentina), which evaluates the occurrence and distribution and reports the national conservation status of the species found. The sources of bird records correspond to books, scientific articles, theses, technical reports, museum collections, web pagesand the personal observations of the authors of this paper. The list consists of 387 bird species (26 orders and 61 families), with 51 new species regarding the 1991 list. From the species identified 188 were resident species, 64 summer migrants, 18 winter migrants, 2 passage migrants and 57 occasional. The conservation status showed 1 species Critically Endangered, 4 Endangered, 7 Threatened, 21 Vulnerable, 348 NotThreatened and 1 Insufficiently Known. It is necessary to reinforce the studies on birds to define the occurrence of 58 species, and to evaluate the current situations of the species not recorded for more than three decades.