Robsonius thompsoni
The Sierra Madre Ground Warbler (Robsonius thompsoni) is a strikingly terrestrial and highly range-restricted passerine, approximately 15 cm (6 inches) in length. Its distinctive appearance features a rufous-orange crown and nape, contrasting with dark brown upperparts that extend to a relatively short tail. The underparts are primarily white on the throat and breast, transitioning to a buffy wash on the flanks, and it possesses strong, dark legs adapted for ground movement. A notable field m...
Resident in primary and secondary lowland to montane rainforests, typically found at elevations between 300 and 1200 meters above sea level.
Feeds primarily on small invertebrates, including insects, spiders, and their larvae, gleaned from leaf litter and low vegetation on the forest floor.
The Sierra Madre Ground Warbler is a notoriously shy and skulking species, spending almost its entire life foraging on the forest floor, rarely venturing above knee-height. It moves with strong, deliberate hops and runs through dense leaf litter, often holding its tail cocked. Foraging involves a...
The Sierra Madre Ground Warbler is strictly endemic to the Sierra Madre mountain range on Luzon Island in the Philippines. Its distribution is confined to the northeastern and central parts of this range, specifically recorded in provinces such as Isabela, Quirino, Nueva Ecija, Aurora, and potent...
Near Threatened
- This species was only recognized as distinct from the Luzon Ground Warbler (Robsonius rabori) in 2013, based largely on unique vocalizations. - It is named after Frank P. Thompson, a collector who obtained the type specimen in 1961. - Its common name 'Ground Warbler' is a bit of a misnomer, as ...