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Geranoaetus melanoleucus (Vieillot, 1819) Figure 5B Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′29′′S, 056°55′52′′W. We saw individuals soaring over the rocky outcrops among with a flock of vultures. In November 2017 we found an active nest placed in a Eucalyptus (L’Hér.) tree (29°05′47′′S, 056°55′03′′W) with one nestling. Identification. Identified by wings broad and tail short and triangular. Underparts and breast gray., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 426, DOI: 10.15560/17.2.415

Colaptes campestris (Vieillot, 1818) Figure 7A Observations. ARGENTINA • Multiple ♂ and ♀; Corrientes, La Cruz, Paraje Tres Cerros; 29°09′20′′S, 056°51′43′′W. We observed several individuals foraging on the open grounds and grasslands and perching on tree branches. Identification. Fairly terrestrial woodpecker. Identified by its both sides of the head, breast and neck, yellow. Crown black and malar red in male., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 431, DOI: 10.15560/17.2.415

Anthus lutescens (Pucherna, 1855) Observations. ARGENTINA • 1 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′ 55′′S, 056°55′15′′W. Recorded in short grasslands. Identification. Very small. Underparts yellowish; breast streaked; brown upperparts streaked with black., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 436, DOI: 10.15560/17.2.415

Donacobius atricapilla (Linnaeus, 1766) Observations. ARGENTINA • 2 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°09′24′′S, 056°50′44′′W. Recorded perching on marsh vegetation in the reservoir. Identification. Head, bill, and tail black; iris yellow; each side of throat with yellowish patch; underparts yellowish; back dark brown., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 436, DOI: 10.15560/17.2.415

Tachycineta leucorrhoa (Vieillot, 1817) Observations. ARGENTINA • 2 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29° 09′04′′S, 056°51′42′′W. Identification. Rump, and loral line white., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 435, DOI: 10.15560/17.2.415

Bubo virginianus (Gmelin, 1788) Observations. ARGENTINA • 1 (sex unknown); Corrientes, La Cruz, Paraje Tres Cerros; 29°09′02′′S, 056°51′ 44′′W. Recorded perching high on a tree. Hidden. Identification. Larger than other owls. Eyes large, yellow. Underparts finely barred., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 430, DOI: 10.15560/17.2.415

Myiothlypis leucoblephara (Vieillot, 1817) Observations. ARGENTINA • Multiple; Corrientes, La Cruz, Paraje Tres Cerros; 29°06′33′′S, 056°55′37′′W. Common in the study site. More often heard than seen. Identification. Differs from Basileuterus culicivorus (Swainson, 1838) in having a white eye ring and blackish eye stripe., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 439, DOI: 10.15560/17.2.415

Piaya cayana (Linnaeus, 1766) Observations. ARGENTINA • 10 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′46′′S, 056°55′26′′′ W. Recorded several times foraging in forest. Identification. Distinguished by its graded very long tail. Upperparts rufous. Coccyzus melacoryphus (Vieillot, 1817) Observations. ARGENTINA • 2 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′ “48′′S, 056°55′14′′W. Two individuals registered in the forests of Cerro Chico. Identification. Mostly brown above and underparts yellowish, with a blackish mask., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 429, DOI: 10.15560/17.2.415

Porphyrio martinicus (Linnaeus, 1766) Observations. ARGENTINA • 1 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°09′19′′S, 056°50′53′′W. Recorded in the reservoir. Identification. Body purple; underparts olive. Bill red, with yellow tip. Legs yellowish., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 427, DOI: 10.15560/17.2.415

Anas flavirostris (Vieillot, 1816) Observations. ARGENTINA • 1♂; Corrientes, La Cruz, Paraje Tres Cerros; 29°09′31′′S, 056°49′51′′W. Identification. Resembles A. georgica (Gmelin, 1789), but smaller, with darker head, shorter neck, and plain flanks., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 423, DOI: 10.15560/17.2.415

Tringa solitaria (Wilson, 1813) Observations. ARGENTINA • 1 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°05′21′′S, 056°57′09′′W. Recorded in flooded grassland during the winter near Cerro Pelón. Identification. Dark upperparts, spotted white; eye ring, throat, and belly white., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 428, DOI: 10.15560/17.2.415

Colaptes melanochloros (Gmelin, 1788) Figure 6H Observations. ARGENTINA • 4♀ 2♂; Corrientes, La Cruz, Paraje Tres Cerros; 29°06′27′′S, 056°55′54′′W. We recorded a nest in a dead tree in November 2016, with three cheeks or nestlings. Identification. Identified by its red semi-crest on nape and white face., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 431, DOI: 10.15560/17.2.415

Sporophila cinnamomea (Lafresnaye, 1839) Figure 9G Observations. ARGENTINA • 1♀; Corrientes, La Cruz, Paraje Tres Cerros; 29°09′41′′S, 056°51′43′′W. Rare. A male observed in wet grasslands near Cerro Capará in February 2013. Identification. Associated with marsh vegetation and grasslands. Males with distinctive, gray cap and rufousred underparts. Similar S. hypochroma (Todd, 1915) has a grayish upperback., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 438, DOI: 10.15560/17.2.415

Ardea alba (Linnaeus, 1758) Figure 4A Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°05′57′′S, 056°55′19′′W. Roosting in large colonies, with other waterbirds, near wetlands. Identification. Larger than similar Snowy Egret (Egretta thula Molina, 1782), but bill yellow and feet blackish in A. alba., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 424, DOI: 10.15560/17.2.415

Melanerpes candidus ( Otto, 1796) Observations. ARGENTINA • 5 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°08′ 58′′S, 056°51′45′′W. Recorded in groups in open habitats. Identification. Differs from other woodpeckers by being white, except for wings, back and tail., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 430, DOI: 10.15560/17.2.415

Vireo chivi (Vieillot, 1817) Observations. ARGENTINA • 4 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29° 08′47′′S, 056°52′28′′W. Recorded in forests. More often heard than seen. Identification. Crown gray; upperparts and tail olive; supercilium white; underparts whitish., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 435, DOI: 10.15560/17.2.415

Platalea ajaja ( Linnaeus, 1758) Observations. ARGENTINA • 1 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°09′20′′S, 056°50′24′′W. Recorded in shallow water in the reservoir. Identification. Identified by its distinctive bill shape. Plumage mostly bright pink., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 425, DOI: 10.15560/17.2.415

Turdus amaurochalinus (Cabanis 1850) Observations. ARGENTINA • Multiple; Corrientes, La Cruz, Paraje Tres Cerros; 29°09′25′′S, 056°51′24′′W. Very common in the study site. Recorded at all seasons. Identification. Bill yellow (dark in females); streaked throat; lower belly whitish; back olive-brownish., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 436, DOI: 10.15560/17.2.415

Theristicus caudatus (Boddaert, 1783) Observations. ARGENTINA • 2 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′35′′S, 056°56′04′′W. Recorded near flooded grasslands. Identification. Similar in shape to T. caerulescens¸ but differs by its rufous cap and neck., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 425, DOI: 10.15560/17.2.415

Phaetusa simplex (Gmelin, 1789) Observations. ARGENTINA • 4 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°09′ 07′′S, 056°49′39′′W. Recorded flying over the reservoir. Identification. Bill large, yellow; back grey; primaries and crown black., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 428, DOI: 10.15560/17.2.415

Volatinia jacarina (Linnaeus, 1766) Observations. ARGENTINA • 1♀ 1♂; Corrientes, La Cruz, Paraje Tres Cerros; 29°06′09′′S, 056°56′10′′W. Identification. Tiny. Males mostly black with dark-blue iridescence; females brown, with streaked breast., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 438, DOI: 10.15560/17.2.415

Crotophaga ani (Linnaeus, 1758) Figure 6A Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29° 09′15′′S, 056°51′00′′W. Common in the area. Generally in flocks. Flying or perching on the shrubs. Identification. Smaller than C. major (Gmelin, 1788); iris black. Different calls., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 429, DOI: 10.15560/17.2.415

Setopagis parvula (Gould, 1837) Figure 6D New records. ARGENTINA • 1 (sex: unknown); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′34′′S, 056°55′ 49′′W. We recorded an individual during the morning, perched on a rock in Cerro Nazareno. Identification. Little nightjar. It was identified by its conspicuous rufous collar on the sides and back of the neck. It has a thin, white stripe from the base of the bill through the cheeks and white throat patch. Hydropsalis torquata (Gmelin, 1789) Observations. ARGENTINA • 1♀ 3♂; Corrientes, La Cruz, Paraje Tres Cerros; 29°06′27′′S, 056°55′56′′W. Identified in flight. Identification. Tail very long, deeply forked. Trochilidae Chlorostilbon lucidus (D’Orbigny & Lafresnaye, 1838) Observations. ARGENTINA • 4♀ 2♂; Corrientes, La Cruz, Paraje Tres Cerros; 29°06′34′′S, 056°56′06′′W. Common in the study site. One individual recorded eating insects in flight. Identification. Male mainly green, with bluish breast. Female gray below., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 430, DOI: 10.15560/17.2.415

Butorides striata (Linnaeus, 1758) Observations. ARGENTINA • 2 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°09′ 19′′S, 056°51′11″W. Recorded perching on a branch near a pond. Identification. Cap gray. Plumage bluish gray with a rufous and white streak on breast, Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 424, DOI: 10.15560/17.2.415

Falco femoralis (Temminck, 1822) Observations. ARGENTINA • 3 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′ 40′′S, 056°55′49′′W. Recorded perching on a power pole. Identification. Upperparts blue-gray. Cere, eye ring, and feet yellow-orange. Head with black and white striped facial pattern. Throat and upper breast white; lower breast blackish., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 432, DOI: 10.15560/17.2.415

Satrapa icterophrys (Vieillot, 1818) Figure 7H New records. ARGENTINA • 3 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′27′′S, 056° 55′54′′W. We saw three individuals perching near the ground in forest edges. Identification. Supercilium conspicuous, bright yellow; crown and back gray., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 433, DOI: 10.15560/17.2.415

Suiriri suiriri (Vieillot, 1818) Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29° 06′45′′S, 056°56′32′′W. Identification. Overall grey; wings and tail darker; supraloral spot, small, white; bill black. Serpophaga subcristata (Vieillot, 1817) Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′45′′S, 056°55′13′′W. Recorded in forests. Identification. Supercilium and coronal stripe white coronal stripe; body grayish above, with belly and lower abdomen yellowish., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 433, DOI: 10.15560/17.2.415

Hemitriccus margaritaceiventer (D’Orbigny & Lafresnaye, 1837) Figure 7E Observations. ARGENTINA • 2 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29° 06′27′′S, 056°55′54′′W. We observed two individuals in the midstory of a forest patch near Cerro Chico. Identification. Head large and gray; iris golden; underparts whitish. Myiophobus fasciatus (Müller, 1776) Observations. ARGENTINA • 5 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29° 06′32′′S, 056°55′40′′W. Recorded in forest edge. Identification. Upperparts brown; two rufous wing bars; iris dark. Streaked underparts. Lathrotriccus euleri (Cabanis, 1868) Observations. ARGENTINA • 4 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′ 45′′S, 056°55′13′′W. Identification. Upperparts, head, and breast olivebrown; wing bars buff; belly grayish; maxilla black and mandible pinkish. Cnemotriccus fuscatus (Cabanis, 1868) Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′45′′S, 056°55′13′′W. Recorded in the understory of Cerro Nazareno forest. Identification. Differs from Lathrotriccus euleri in having two rufous wing bars and a long, brown supercilium., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 433, DOI: 10.15560/17.2.415

Hymenops perspicillatus (Gmelin, 1789) Figure 7G Observations. ARGENTINA • 2♂; Corrientes, La Cruz, Paraje Tres Cerros; 29°06′27′′S, 056°55′54′′W. Two males observed perching in the grassland near water bodies. Identification. Male black overall, with a yellowish, fleshy eye ring., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 433, DOI: 10.15560/17.2.415

Geranoaetus albicaudatus (Vieillot, 1816) Figure 5A Observations. ARGENTINA • 1 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′39′′S, 056°55′27′′W. One individual recorded perching in Pinus sp. Identification. Identified by primaries extended beyond white tail. Shoulders rufous and hood blackish., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 426, DOI: 10.15560/17.2.415

Buteogallus urubitinga (Gmelin, 1788) Figure 4H Observations. ARGENTINA • 1 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°05′39′′S, 056°56′08′′W. We saw one individual flying in the grassland near water. Identification. Almost entirely black. Tail is mostly black with a broad white band. Rupornis magnirostris (Gmelin, 1788) Observations. ARGENTINA • 10 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°07′27′′S, 056°53′44′′W. Recorded in all seasons. Common in forest edges and open areas. Identification. Head and upperparts brown, barred on breast and belly. Cere and iris yellow., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 426, DOI: 10.15560/17.2.415

Podilymbus podiceps (Linnaeus, 1758) Observations. ARGENTINA • 1 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°08′50′′S, 056°50′50′′W. One individual was recorded in March 2016 in the reservoir. Identification. Non-breeding plumage p redominantly dark brown; throat whitish. Bill short, thick, and pale., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 423, DOI: 10.15560/17.2.415

Caracara plancus (Miller, 1777) Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°09′ 13′′S, 056°51′24′′W. Common in the study site. Recorded in every season. Identification. Mostly dark brown. Crown black; neck white. Cere and face orange., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 431, DOI: 10.15560/17.2.415

Ardea cocoi (Linnaeus, 1766) Figure 3H Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′19′′S, 056°55′25′′W. Several individuals, recorded in all seasons, foraging near or in shallow water. Identification. Largest of the herons. Black on head. Mainly grey over back and wings., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 424, DOI: 10.15560/17.2.415

Machetornis rixosa (Vieillot, 1819) Figure 8B Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′27′′S, 056°55′54′′W. We saw several individuals in open woodland, grasslands, and flooded savanna. Identification. Terrestrial. Legs long; iris light red; crown concealed, orange., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 434, DOI: 10.15560/17.2.415

Riparia riparia (Linnaeus, 1758) Observations. ARGENTINA • 1 (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°09′ 20′′S, 056°50′47′′W. Recorded in open waters in the serevoir. Identification. Upperparts grayish brown, with darker remiges; breast brown; throat and underparts white., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 435, DOI: 10.15560/17.2.415

Mimus triurus (Vieillot, 1818) Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29° 09′24′′S, 056°54′50′′W. Winter visitor. Recorded every year during May to August. Identification. Rump rufous; with a conspicuous, white wing band., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on page 436, DOI: 10.15560/17.2.415

Basileuterus culicivorus (Swainson, 1838) Figure 10D Observations. ARGENTINA • Multiple (no sexual dimorphism); Corrientes, La Cruz, Paraje Tres Cerros; 29°06′35′′S, 056°56′02′′W. Several adults foraging in the understory of the forests, during all seasons. Identification. Crown with two broad, lateral, black stripes; supercilium white., Published as part of Fernandez, Juan Manuel, Thomann, Luz, Fandiño, Blas, Cajade, Rodrigo & Hernando, Alejandra, 2021, An annotated checklist of birds of Paraje Tres Cerros, Corrientes province, Argentina, pp. 415-443 in Check List 17 (2) on pages 439-440, DOI: 10.15560/17.2.415