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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 Delta del Paraná

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: 362555
  Juvenile

Delta del Paraná
Buenos Aires
Argentina
11/10/2019
Daniel Osvaldo Fernández
Foto
Photography ID: 361062
  Adult

Delta del Paraná
Buenos Aires
Argentina
03/16/2019
Sebastián Otero
Foto
Photography ID: 361038
  Juvenile

Delta del Paraná
Buenos Aires
Argentina
05/11/2019
Sebastián Otero
Foto
Photography ID: 320621
  Adult

Delta del Paraná
Buenos Aires
Argentina
03/04/2019
Eduardo Soriano
Foto
Photography ID: 243720
  Adult

Delta del Paraná
Buenos Aires
Argentina
01/27/2018
Diego Carus
Foto
Photography ID: 208812
  Adult

Delta del Paraná
Buenos Aires
Argentina
08/14/2016
Vicente Piccirillo
Foto
Photography ID: 180297
  Adult

Delta del Paraná
Buenos Aires
Argentina
12/08/2016
Eduardo Soriano
Foto
Photography ID: 170411
  Juvenile

Delta del Paraná
Buenos Aires
Argentina
10/08/2016
Sergio Gabriel Borrillo
Foto
Photography ID: 156772
  Juvenile

Delta del Paraná
Buenos Aires
Argentina
07/09/2016
Diego Carus
Foto
Photography ID: 117429
  Adult

Delta del Paraná
Buenos Aires
Argentina
10/03/2015
Virginia Bonifacio



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 Reports


 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
213329011/08/2024ArgentinaBuenos AiresRío Capitán, Delta del Paraná1Gabriel Carbajales
177507404/06/2023ArgentinaBuenos AiresDelta del ParanáEsteban Argerich
176840120/05/2023ArgentinaBuenos AiresÁrea Natural Protegida Monte Blanco (Ex Delta Terra), Delta del ParanáDiego Carus
165688901/10/2022ArgentinaBuenos AiresCamping Cielo, Delta del Paraná1Mauricio Secchi
165352201/10/2022ArgentinaBuenos AiresCamping Cielo, Delta del Paraná1Eduardo Ruiz
163577604/09/2022ArgentinaBuenos AiresCamping Cielo, Delta del Paraná3Sebastián Otero
163570503/09/2022ArgentinaBuenos AiresCamping Cielo, Delta del Paraná1Sebastián Otero
163475903/09/2022ArgentinaBuenos AiresCamping Cielo, Delta del ParanáMauricio Secchi
161513216/07/2022ArgentinaBuenos AiresCamping Cielo, Delta del ParanáMauricio Secchi
159479528/05/2022ArgentinaBuenos AiresCamping Cielo, Delta del ParanáDaniel Osvaldo Fernández
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.