The Rufescent Tiger-Heron (Tigrisoma lineatum) is often seen at REGUA’s wetlands. This species belongs to the Ardeidae family and inhabits Central and South America. Its head, sides of the head, and long, thick neck are rich chestnut brown to rufous cinnamon. The bill is relatively long, up to 10 cm, appearing slightly up tilted, and varies in colour according to age and season, in ways that are not well understood. Immature birds are variable, undergoing gradual plumage changes through the fifth year. The adult Rufescent Tiger-Heron is identified by its rich chestnut to rufous brown neck and head, dark and white lined throat, dark flanks with narrow white bands, white banded under wings, and relatively long neck and lower legs. Male and female reaching adult age are alike, although there is an indication of sexual difference in plumage details.
This species inhabits wooded tropical swamps. It occurs especially along slow-moving rivers in swamp forests, gallery forest, mangrove swamps and in other extensive forested wetlands. It is a typical bird from the great wetlands of South America, the Amazon, the Paraguayan and Argentinean Chaco, and the Brazilian Mato Grosso. It is common to spot them on rainy and dark days, as they seem to be lonely bird. Their nests are often built on top of trees and shrubs, composed by many sticks. The breeding season is not well documented and there is a need for additional study. Its diet includes fish, amphibians, insects, and snakes. Its long tarsus, bill, and neck suggests a primary adaptation for fishing. When they feel threatened, they remain motionless until they finally fly, finding shelter on top of the trees.
These pictures were taken by Claudia Bauer, a renowned Brazilian ornithologist who belongs to a birdwatcher’s club in Rio de Janeiro. She often comes to REGUA to photograph birds and nature. It is an inspiring hobby!
© Claudia Bauer