American Bittern

How to find it

Watch seasonal freshwater marshes, especially in the highlands, as one local guide advises. Scan the edges of tall reeds and cattail slowly, looking for a streaked shape standing still, perhaps with its bill pointed at the sky. Wetlands are hard to reach and few birders search every corner of the country, so a few bitterns may have wintered unnoticed. Even a small marsh beside a public road can hold one, as it did in 2023.

How to recognise it

This is a medium, stocky, streaked bird. Look for these marks:

Chestnut crown.

Buff neck.

Chest streaked reddish brown.

Wide black stripe down each side of the neck.

Yellowish bill.

Greenish legs.

Immatures have the black neck stripe reduced or missing, which makes them harder to place. In flight the dark outer wing contrasts with the paler brown inner wing and body.

What it sounds like

Recording: Erika Mitchell, CC BY 4.0, source, read 4 Nov 2026.

Behaviour and diet

The bird is described as nocturnal in Costa Rica. Elsewhere it hunts by standing still at the water edge, and it is most active at dawn and dusk.

When alarmed it freezes and stretches its bill skyward, so its streaks blend with upright reeds. That freeze is the main reason a bittern can stand in plain view and still go unseen.

Where it lives

In Costa Rica it frequents freshwater marshes with tall reeds and cattail. Long ago it used the large marshes of the Central Valley and the upper Reventazón valley, now almost completely drained. Recent records come from small wetlands in Alajuela, Cartago and the south near Ciudad Neily.

When to see it

The 2023 bird was found on October 22 and was still present in mid-November. It stayed through that winter, and it is called a rare winter visitor.

Similar birds

The Pinnated Bittern is the main confusion. The American has a black stripe on the side of the face and a neck without fine barring, while the Pinnated shows barring on the head and neck. The 2023 bird was checked against Pinnated and had a black stripe below the cheek and an unbarred neck. Young night-herons are spotted with white below.

Names and lore in Costa Rica

The Spanish name on the Costa Rican list is Avetoro Norteño, and a second local name, Puncus, is given beside it.

Status and conservation

The AOCR list marks it M?, and the national museum lists it as a migratory species of Least Concern, accidental or of uncertain status in the Greater Metropolitan Area.

Photography tips

At the 2023 marsh the bittern showed only from one angle, and stepping a few paces left or right left only reeds in view. Take your time to find the right spot before moving.