The Story
I photographed this Chestnut-capped Warbler (Basileuterus delattrii) in the Cincinati area above Minca, in the Sierra Nevada de Santa Marta, Magdalena, Colombia, at about 1,330 meters. It was long lumped with the Rufous-capped Warbler, and eBird now treats the two as separate species. It has a chestnut crown and ear patch, a long white eyebrow and golden yellow underparts, and both sexes look alike. In Colombia it ranges from the Caribbean south along the Central Andes to Huila, with a separate population in the Serranía del Perijá.
I photographed it with a Canon R5 and the RF 800mm f/11, at 1/125 sec, f/11, ISO 3200, +1.5 EV. The Sierra Nevada de Santa Marta is an isolated range, separate from the Andes, that rises to 5,700 meters just 42 kilometers from the Caribbean coast.
©2021 Adam Rainoff Photographer
The bird
The Chestnut-capped Warbler (Basileuterus delattrii) belongs to the family Parulidae (New World Warblers) in the eBird/Clements taxonomy.
Source: eBird.org (opens in a new tab)
Conservation
Least Concern on the IUCN Red List (assessment published 2020), with the population trend listed as decreasing. IUCN does not yet assess the Chestnut-capped Warbler separately; this is the assessment of Rufous-capped Warbler (Basileuterus rufifrons), which IUCN treats as including it. Source: IUCN Red List