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Tigrisoma lineatum

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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Synonyms: Ardea lineata.

Subspecies:





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Records from Formosa

Conservation status according to BirdLife International: Least Concern


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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Geographic distribution


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Species photographs

Last published photographs

Foto
Photography ID: 697694
  Adult

Las Lomitas
Formosa
Argentina
07/29/2026
Tiago Vaggi
Foto
Photography ID: 682429
  Adult

Formosa
Formosa
Argentina
06/21/2022
Oscar Alfredo Eliseche
Foto
Photography ID: 681952
  Adult

Bañado La Estrella
Formosa
Argentina
06/19/2022
Oscar Alfredo Eliseche
Foto
Photography ID: 655840
  Adult

Loma Monte Lindo Pirané
Formosa
Argentina
09/20/2025
Héctor Schreiber
Foto
Photography ID: 654828
  Adult

Pirané
Formosa
Argentina
09/19/2025
Héctor Bernardo Fernández
Foto
Photography ID: 654698
  Adult

Loma Monte Lindo Pirané
Formosa
Argentina
09/20/2025
Agostina Salvatorio
Foto
Photography ID: 652250
  Immature

Monte Lindo
Formosa
Argentina
08/10/2025
Gustavo Daniel González
Foto
Photography ID: 649340
♂ ♀
  Adult

Villa del Carmen
Formosa
Argentina
08/24/2025
Zulima América Schupbach
Foto
Photography ID: 649166
♂ ♀
  Adult

Villa del Carmen
Formosa
Argentina
07/24/2025
Zulima América Schupbach
Foto
Photography ID: 649165
♂ ♀
  Adult

Villa del Carmen
Formosa
Argentina
07/24/2025
Zulima América Schupbach
Foto
Photography ID: 649164
  Adult

Villa del Carmen
Formosa
Argentina
07/24/2025
Zulima América Schupbach



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Species reports



 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
250805010/08/202617:49ArgentinaFormosaRuta Provincial 281Gustavo Fernando Durán
250622429/07/2026ArgentinaFormosaFortin La Soledad, Las LomitasTiago Vaggi
249242108/07/2026ArgentinaFormosaLoma Monte Lindo PiranéMarcelo Funes
237184720/09/2025ArgentinaFormosaPuerto Onza, Loma Monte Lindo PiranéHéctor Schreiber
236956720/09/2025ArgentinaFormosaPuerto Onza, Loma Monte Lindo PiranéAgostina Salvatorio
236985919/09/2025ArgentinaFormosaPuerto Onza, PiranéHéctor Bernardo Fernández
234921724/08/2025ArgentinaFormosaRancho Galarza-lopez, Villa del CarmenZulima América Schupbach
235607715/08/2025ArgentinaFormosaReserva El BagualEsteban Argerich
234389912/08/2025ArgentinaFormosaRuta Provincial 28 - entre Las Lomitas y el Vertedero del Bañado La EstrellaDolores Fernandez
235905710/08/2025ArgentinaFormosaMonte LindoGustavo Daniel González
Page 1

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Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. Rufescent Tiger Heron (Tigrisoma lineatum) – Species account. Accessed from www.ecoregistros.org on 23/09/2026.