Fasciated Tiger-Heron

How to find it

Check the edges of fast, rushing streams, and scan midstream rocks for a bird standing on a boulder or gravel. Scan rocky rainforest rivers with care, since it may stand just around a bend or sit still behind a big river rock. In the Sarapiquí area, scanning the river from a riverside lodge or from the Chilamate bridge gives a good chance, and a boat trip also works. One source notes it is no more common there than elsewhere, but the river is easy to watch. It can also turn up on many rocky, forested rivers at middle elevations, and one birder found one on the Balsas River near San Luis. It is stealthy and probably scarce, so finding one may take a while.

How to recognise it

Adults have a black crown, gray sides to the face and a blackish neck with fine pale stripes.

The bare facial skin and the sides of the throat are yellow, and the eyes are yellow too. The belly is dull rufous. The bill is short, stout and mostly black.

Across its range it is the smallest of the three tiger-herons, about 58 to 64 cm long, and its bill is shorter and stouter than in the others. It is stockier than other herons, with shorter legs that may help it keep its balance on slippery river rocks. Juveniles are pale brown with dark patterning.

Behaviour and diet

It walks slowly among the rocks or waits at the water's edge for fish and large aquatic insects. It is often seen standing motionless on boulders or gravel in midstream while hunting, which is why it so easily looks like a rock in the river.

It is shy. When startled it flies around a river bend or to a tree at the edge of the water. When it feels threatened, it stretches its neck and body almost fully upright to get a wider view of its surroundings.

Where it lives

In Costa Rica it lives mainly on the Caribbean slope, from the Cordillera de Guanacaste (Bijagua) south to Panama. It keeps to streams and rivers in the foothills, mostly at 250 to 800 m, and prefers fast, rocky water in forested, hilly country. A national museum catalogue lists it as resident at 100 to 900 m.

Trout introduced into some highland streams have let local populations reach up to 2,400 m, as on the Río Los Ángeles, north of Cerro de la Muerte.

When to see it

A national museum catalogue gives the rainy season as its breeding period.

Similar birds

The Rufescent Tiger-Heron looks somewhat similar but prefers still water at lower elevations. Adults are easy to tell apart, but juveniles of both are pale brown with dark patterning and almost impossible to separate in the field, so habitat is the best clue: this species is on fast rocky streams. The Bare-throated Tiger-Heron is larger with a yellow bare throat, while the Fasciated has a white feathered throat.

Names and lore in Costa Rica

Costa Ricans also call it Martín Peña or Pájaro Vaco. The official Spanish name, Garza-Tigre de Río, points to its river habitat.

Status and conservation

Listed as a resident (R) on the AOCR list, it is uncommon and local across its range and rated Least Concern by the IUCN.

Photography tips

Scan the midstream rocks for a possible subject, since it is often seen standing motionless on boulders or gravel while hunting fish. Because it holds still for so long, a patient watch from a bridge or bank can pay off.