Tyrannus savana (Vieillot, 1808)

Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, Check List 17 (2), pp. 415-443 : 434-435

Tyrannus savana (Vieillot, 1808)

Figure 8E

Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′

27′′S, 056°55′54′′W. This species was observed during the summer season since the beginning of the study. Generally highly visible. We saw several individuals perching on fences or catching insects in flight.

Identification. Underparts white and upperparts gray; head and tail black; tail extremely long and forked.

Myiarchus swainsoni (Cabanis & Heine, 1859) Observations. ARGENTINA • 3 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°09′ 20′′S, 056°51′36′′W. Recorded in the forest of Cerro Naz- areno and Cerro Capará .

Identification. Mandible brown; wing coverts edged with white.

Myiarchus tyrannulus (Müller, 1776)

Observations. ARGENTINA • 2 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′ 32′′S, 056°55′39′′W. Recorded mostly in midcanopy lev- els in forest .

Identification. Differs from M. swainsoni by its bushy crest and rufous-edged primaries.