Thick-billed Warbler

Arundinax aedon

Bulbul-sized large warbler with a long tail, a stubby bill, and a plain face. Breeds in East Asia; winters in South and Southeast Asia. Structurally similar to Clamorous Reed Warbler but has a shorter, blunter bill, no eye-stripe or brow, different vocalizations, and no particular preference for water. Rather skulky, it keeps to dense grasses, forest edge, and shrubbery. Song is long and complex, consisting of short bursts of high piercing notes, harsh snappy chattering, and mellow warbles. Calls include a hard, fast, continuous arrhythmic “thk…thk, thk, thk” emanating but from the undergrowth.

Taxonomy

Scientific name
Arundinax aedon
Authority
(Pallas, 1776)
Order
Passeriformes
Family
Acrocephalidae
Genus
Arundinax

Range and habitat

Breeding range
PAL : nc, ne
Non-breeding range
se Asia
Migration
Complete migrants

Conservation

Population trend
declining

Photos

Distribution

Bird Calls

Other Birds

South American Painted-Snipe

South American Painted-Snipe

Nycticryphes semicollaris

Distinctive and attractive, but a rarely seen denizen of fresh and brackish wetlands, especially with shallow water and low to knee-high grasses; also found on lakeshores with taller reeds and rushes. Occasionally seen feeding quietly at edge of vegetation, but mostly seen when flushed from close range. Flies up silently with stiff flicking wingbeats and brief glides, long legs trailing, and drops back to cover usually not far away. Note bold white spots on wings and droop-tipped bill. Related to jacanas, not closely related to the typical snipe.

Choco Sirystes

Choco Sirystes

Sirystes albogriseus

A medium-sized flycatcher, reminiscent of a mix between a becard and a Myiarchus flycatcher. Uncommon to rare in lowlands and foothills from eastern Panama to northwest Ecuador. Gray above and white below with a dark cap and black wings with bold white edging. More slender-bodied and longer-tailed than a becard. Occurs in open areas, second-growth, and forest edge, often perching conspicuously in the middle to upper levels.

Dugand's Antwren

Dugand's Antwren

Herpsilochmus dugandi

Handsome antwren found in the canopy of lowland rainforest in eastern Ecuador, northeastern Peru, and southern Colombia. Male is gray with black crown, eye-stripe, and upper tail; wings are black with white bars and tail has white edges. Female is similar but with a brown crown and buffy or yellowish wash on breast. Compared to Ancient Antwren, male Dugand’s lacks yellow on underparts, and female has a brown crown. Usually seen with mixed-species flocks very high in the trees. More easily seen from a canopy tower or walkway if one is available. Song is a fast, accelerating series of dry “chup” notes.

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