Sunbittern

Overview

The Sunbittern is a slender, long-necked bird found along shaded streams and wetland edges from southern Mexico through Central America into the Amazon basin. At rest, its finely patterned brown, black, and buff plumage provides excellent camouflage against bark and leaf litter, but when the wings are spread in flight or in a threat display, a dramatic sunburst pattern of chestnut, black, and buff is revealed. It is the sole living member of its family, with its closest relative being the Kagu of New Caledonia.

Feather Identification

• Body: Finely vermiculated and barred plumage in browns, black, and buffy tones, providing camouflage against leaf litter and bark.
• Wings: When spread in flight or display, large chestnut-orange, black, and buff eyespot-like patches are revealed on the flight feathers, a pattern unlike any other bird sharing its range.
• Neck and bill: Long and slender.
• Tail: Barred with dark bands.
• Versus similar birds: Herons and bitterns lack this hidden wing pattern and have different bill and neck proportions; the Sunbittern's dramatic wing display when threatened is unique.

Plumage Notes

Sexes are similar. Juveniles resemble adults with a slightly duller wing pattern. Molt is not strongly tied to a distinct season, consistent with its largely non-migratory tropical lifestyle.

Habitat & Range

The Sunbittern is found from southern Mexico through Central America and into the Amazon basin and parts of the Guianas. It inhabits shaded streamsides, forest wetland edges, and slow-moving rivers within humid lowland forest, and is resident and non-migratory.

Behavior & Field Notes

Sunbitterns forage by walking slowly along stream edges, stalking small fish, insects, and amphibians. When threatened, they spread their wings in a startling display that reveals the hidden sunburst pattern. They build a bulky nest of mud and vegetation in a tree, and their call is a thin, high whistle.