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Rufescent Tiger Heron

Tigrisoma lineatum
(Boddaert, P, 1783)
Hocó Colorado
Socó-boi

Family: Ardeidae
Order: Pelecaniformes
Class: Aves
Phylum / Division: Chordata
Kingdom: Animalia

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Records from Formosa

Conservation status according to BirdLife International: Least Concern

Synonyms: Ardea lineata.

Subspecies:


Description: It is a medium to large-sized heron with a robust build and upright posture. Adults show a distinctive combination of rufous head and neck, contrasting with a dark gray dorsal area and a paler gray underside. From the throat to the upper chest, it displays long reddish and white streaks, a key identifying feature. The bill is strong and pointed, adapted for capturing aquatic prey, and the legs are long for wading in shallow waters. The eyes are usually pale and stand out against the face. At rest, it keeps its neck retracted, but when alert it extends it, making the streaked pattern more visible. Juveniles differ markedly, showing a heavily barred pattern in ochre, brown, blackish, and white tones, which provides effective camouflage among vegetation.

Geographic distribution: It is widely distributed across tropical and subtropical America, from southern Mexico to northern Argentina and Uruguay. It occurs throughout much of Central and South America, including Brazil, Paraguay, Bolivia, and Colombia. Although it may be locally common, it is often overlooked due to its secretive behavior and preference for densely vegetated habitats.

Habitat: It primarily inhabits freshwater wetlands, such as marshes, swamps, lagoons, and the edges of slow-moving rivers and streams. It favors areas with dense emergent or riparian vegetation, which provide cover and hunting grounds. It may also occur in floodplains and occasionally in mangroves. It tends to avoid heavily disturbed environments, preferring relatively well-preserved areas.

Feeding: Its diet mainly consists of fish, amphibians, and aquatic insects, though it may also take crustaceans and small reptiles. It uses a hunting strategy based on stillness and ambush, remaining motionless for long periods until detecting prey, then striking quickly and precisely with its bill. It may also move slowly through shallow water while carefully scanning its surroundings.

Behavior: This species is generally solitary and largely crepuscular, though it may be active during the day. It is known for its secretive and cautious behavior, often remaining still or moving slowly to avoid detection. When threatened, it may adopt rigid postures to blend with surrounding vegetation. Its flight is direct, with slow wingbeats and the neck retracted. Vocalizations are infrequent and low-pitched.

Nesting: It builds platform nests of sticks, usually placed in trees or shrubs near water. Breeding typically coincides with periods of higher food availability. The clutch usually consists of 2 to 4 eggs, and both parents share incubation and chick-rearing duties. The young remain in the nest until ready to fledge and are fed by regurgitation.

Conservation status: It is currently classified as Least Concern, due to its wide distribution and relatively stable population. However, it faces local threats such as wetland loss and degradation, pollution, and human disturbance. The conservation of wetland habitats is essential for its persistence.


Author of this compilation: EcoRegistros – 04/17/2026





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Last published photographs

Foto
Photography ID: 682429
  Adult

Formosa
Formosa
Argentina
06/21/2022
Oscar Alfredo Eliseche
Foto
Photography ID: 592896
 
Formosa
Formosa
Argentina
07/21/2024
Bc_pajareritos Agriornis
Foto
Photography ID: 527538
  Adult

Formosa
Formosa
Argentina
11/28/2022
José Luis Ianiro
Foto
Photography ID: 500095
  Adult

Formosa
Formosa
Argentina
06/08/2022
Patricia Gabriela Mancilla Iglesias



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
212086621/07/2024ArgentinaFormosaHerradura, Formosa1Bc_pajareritos Agriornis
211637820/07/2024ArgentinaFormosaRiacho El Pucú, Formosa1Bc_pajareritos Agriornis
186686717/12/2022ArgentinaFormosaReserva de Biósfera Laguna Oca, Formosa1Fabricio Candia
173314028/11/2022ArgentinaFormosaCostanera de Formosa, FormosaJosé Luis Ianiro
186686102/10/2022ArgentinaFormosaLaguna Oca, Formosa1Fabricio Candia
245816921/06/2022ArgentinaFormosaRuta 11 (antes del ingreso a Ruta 2), FormosaOscar Alfredo Eliseche
160871508/06/2022ArgentinaFormosaCostanera de Formosa, FormosaPatricia Gabriela Mancilla Iglesias
186684614/05/2022ArgentinaFormosa1241 Ruta Nacional 81, Formosa2Fabricio Candia
186685411/09/2021ArgentinaFormosaFormosa, Formosa3Fabricio Candia
186685510/09/2021ArgentinaFormosaFormosa, Formosa2Fabricio Candia
Page 1

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Citation recommended:

EcoRegistros. 2026. Rufescent Tiger Heron (Tigrisoma lineatum) - Species sheet. Acceded from https://www.ecoregistros.org on 19/04/2026.