Yellow-crowned Redstart
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Quick Facts
- Scientific Name: Myioborus flavivertex
- Spanish Name: Candelita coroniamarilla
- Family: Parulidae
- Known Nicknames: Yellow-crowned Whitestart
- Average Length: 12–13 cm / 4.7–5.1 in
- Average Weight: 10–12 g / 0.35–0.42 oz
- Wingspan: 18–20 cm / 7.1–7.9 in
- Key Feature: Bright yellow crown bordered by black, contrasting with white underparts and black face
- Primary Diet: Insectivore
- Range: Santa Marta Mountains and adjacent Sierra Nevada de Santa Marta, Colombia
- Habitat: Montane cloud forest and humid forest edges, 1,500–3,000 m
- Social Structure: Solitary or in pairs
- Nesting/Breeding: Domed nest on a bank or among roots
- Conservation Status: Least Concern (LC)
- Population Trend: Stable
The Yellow-crowned Redstart (*Myioborus flavivertex*) is a dazzling, active warbler endemic to the high-altitude cloud forests of Colombia and Ecuador. Instantly recognizable by its brilliant, golden-yellow crown that contrasts sharply with its slate-black hood and upperparts, this bird also sports a striking white patch on its wing and a long, white-edged tail. Its most unique feature is a specialized foraging behavior: it fans its tail wide to flush out hidden insects, flashing the white outer feathers like a signal, before darting to catch its startled prey. This vibrant, acrobatic species is a true gem of the Andean treeline, often seen flitting energetically among mossy branches.
Fun Facts
The Yellow-crowned Redstart has a bizarre, tail-first foraging style: it constantly fans its black-and-white tail feathers side to side like a semaphore signal, a behavior called “tail-flashing” that flushes hidden insects into the open. Unlike most warblers, it often hangs upside down from twigs while gleaning prey, and its bright yellow crown acts as a territorial badge that can puff up into a tiny crest during aggressive displays. Endemic to the high-altitude cloud forests of Colombia’s Sierra Nevada de Santa Marta, this bird also performs a unique “wing-fluttering” dance—rapidly vibrating both wings while hopping—to confuse predators or attract mates.
Habitats & Distribution
The Yellow-crowned Redstart is found exclusively in the northern Andes of South America, with its geographical range restricted to the Sierra Nevada de Santa Marta in northern Colombia. This species inhabits humid montane forests, cloud forests, and forest edges at elevations generally between 1,500 and 3,000 meters. It prefers dense understory vegetation and often occurs near streams or in areas with mossy trees, where it actively forages for insects in the lower to middle canopy layers.
Behaviours & Reproduction
The Yellow-crowned Redstart is a monogamous species, with pairs forming during the breeding season and remaining together to defend small territories in Andean cloud forests. Courtship involves the male performing fluttering flights and displaying his bright yellow crown and rufous flanks to the female, often while fanning his tail. The female builds a domed nest with a side entrance, typically placed on a bank or among tree roots, using moss, leaves, and fibers. She lays a clutch of two to three white eggs with reddish speckles, and both parents share incubation duties for about two weeks. After hatching, the adults feed the chicks insects and berries, with the young fledging around 12–14 days. A unique strategy is their cooperative antipredator behavior: adults perform a “broken-wing” display to distract predators from the nest, a technique common among ground-nesting warblers but refined here for their montane habitat. There is no evidence of extra-pair copulations or helpers at the nest, reinforcing a simple but effective pair-bonded social structure.
Diet
The Yellow-crowned Redstart is primarily an insectivore, foraging actively by gleaning insects and spiders from leaves, branches, and bark in the understory and canopy of cloud forests. Its diet consists largely of small arthropods such as beetles, caterpillars, flies, and ants, which it captures with quick, fluttery movements and occasional short aerial sallies. A fascinating aspect of its feeding behavior is its use of a distinctive tail-fanning display, where it spreads its black-and-white tail feathers to flush hidden prey from foliage, a technique shared with other redstarts. Additionally, it has been observed to consume small berries and fruits opportunistically, especially during the non-breeding season when insect availability may decline.
Colors
The Yellow-crowned Redstart has a striking bright yellow crown and face, contrasting with a black back, wings, and tail. Its underparts are vivid yellow, with a black bib extending from the throat to the upper chest. The outer tail feathers are white, creating a flash pattern when fanned, which is used to startle insects. This species lacks specific camouflage adaptations, relying instead on its bold coloration for display and foraging.
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