An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina Author Fernandez, Juan Manuel Author Thomann, Luz Author Fandiño, Blas Author Cajade, Rodrigo Author Hernando, Alejandra text Check List 2021 2021-03-08 17 2 415 443 http://dx.doi.org/10.15560/17.2.415 journal article 10.15560/17.2.415 1809-127X Pitangus sulphuratus (Linnaeus, 1766) Figure 8C Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes , La Cruz , Paraje Tres Cerros; 29°06′27′′S , 056°55′54′′W . Observed in all surveys in dif- ferent habitats . Identification. Voice and bill size allow for separation from Megarynchus pitangua (Linnaeus, 1766) Myiodynastes maculatus (Müller, 1776) Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes , La Cruz , Paraje Tres Cerros; 29°06′36′′S , 056°55′23′′W . Recorded in summer in forest edges and semi-open habitats . Identification. Underparts streaked with black; mask black; tail rufous; supercilium whitish. Megarynchus pitangua (Linnaeus, 1766) . Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes , La Cruz , Paraje Tres Cerros ; 29°06′36′′S , 056°55′23′′W . Migratory in Argentina. Re- corded in summer in various habitats types . Identification. Differs from Pitangus sulphuratus by its exceptionally larger bill. Empidonomus varius (Vieillot, 1818) Observations. ARGENTINA • 2 (no sexual dimorphism); Corrientes , La Cruz , Paraje Tres Cerros; 29°06′ 32′′S , 056°55′40′′W . Recorded in summer in the canopy of forest . Identification. Similar but smaller and slender than Myiodynastes maculatus .