Santa Marta Woodstar
Quick Facts
- Scientific Name: Chaetocercus astreans
- Spanish Name: Colibrí de Santa Marta
- Family: Trochilidae
- Known Nicknames: Santa Marta Blossomcrown, Lance-billed Woodstar
- Average Length: 8–9 cm / 3.1–3.5 in
- Average Weight: 3–4 g / 0.11–0.14 oz
- Wingspan: 11–13 cm / 4.3–5.1 in
- Key Feature: Iridescent violet gorget on males
- Primary Diet: Nectarivore (supplemented with insects)
- Range: Endemic to the Sierra Nevada de Santa Marta, Colombia
- Habitat: Humid montane forest edges and clearings
- Social Structure: Solitary
- Nesting/Breeding: Small cup nest on tree branch
- Conservation Status: Near Threatened (NT)
- Population Trend: Decreasing
The Santa Marta Woodstar (*Chaetocercus astreans*) is a dazzling, diminutive hummingbird endemic to the Sierra Nevada de Santa Marta in Colombia, measuring just over 7 cm long. Its most striking feature is the male’s iridescent, deep violet throat and forecrown, which flash like gems against an otherwise glittering green body and bronzy tail, while the female is more subdued with a white throat and buffy underparts. This species is a master of high-speed, insect-like flight, its wings beating so rapidly they produce a distinctive humming trill as it hovers to sip nectar from flowering shrubs. A true alpine specialist, it breeds only in the cool, misty cloud forests and páramo edges of this isolated mountain range, making it one of the most range-restricted and sought-after hummingbirds for birdwatchers.
Fun Facts
Despite being one of the world’s smallest birds at just 6–7 cm, the Santa Marta Woodstar has a bizarre adaptation: it enters a nightly torpor—a state of suspended animation—dropping its body temperature to conserve energy in the cool mountain air of Colombia’s Sierra Nevada de Santa Marta. Males perform a startling courtship display, zipping back and forth like a tiny fighter jet while emitting a high-pitched, bee-like buzz with their wing feathers, and they guard tiny flower patches so fiercely that they will chase away hummingbirds several times their size. Their nest is a minuscule cup of cobwebs and moss, camouflaged so perfectly against lichen-covered bark that it often goes unnoticed even by seasoned ornithologists.
Habitats & Distribution
The Santa Marta Woodstar is restricted to humid montane and cloud forests, typically at elevations between 1,200 and 2,400 meters. It favors forest edges, clearings, and areas with abundant flowering plants and epiphytes. Its entire geographical range is confined to the Sierra Nevada de Santa Marta massif in northern Colombia, making it an endemic species with a very limited distribution.
Diet
The Santa Marta Woodstar (Chaetocercus astreans) is a tiny hummingbird that feeds primarily on nectar from a variety of flowering plants, often favoring tubular blossoms such as those of *Palicourea* and *Fuchsia* species, which it visits with rapid, hovering flight using its specialized, extendable tongue. To meet its exceptionally high metabolic demands, this bird also supplements its diet with small arthropods like spiders, flies, and aphids, which it gleans from foliage or snatches from the air in brief sallies. Interestingly, its extremely high wingbeat frequency—up to 80 beats per second—requires it to consume nearly its entire body weight in nectar and insects each day, and it has been observed to enter torpor on cool nights to conserve energy when food is scarce.
Colors
The male Santa Marta Woodstar has iridescent green upperparts, a brilliant magenta throat (gorget), and a white breast with a forked, dark tail; the female is green above with white underparts, buffy flanks, and white-tipped outer tail feathers, lacking the male's vivid gorget but exhibiting subtle countershading for camouflage in its cloud forest habitat.
