Introduction
The White-tipped Sicklebill (Eutoxeres aquila) is a forest-dwelling hummingbird in the family Trochilidae. It is named for its strongly downcurved, sickle-shaped bill and the white tips of its tail feathers. The species is a resident of humid tropical forests in Central and north-western South America, where it is often associated with Heliconia and other curved, tubular flowers.
Physical Description
The White-tipped Sicklebill is a robust hummingbird measuring approximately 12–13 cm in length and weighing about 8–11 g. Its most distinctive feature is its long, strongly decurved bill. The upper mandible is dark, while much of the lower mandible is yellowish.
Adults have dark bronze-green upperparts, darker wings, and a blackish throat and breast marked with pale buff or whitish streaks. The lower underparts are paler and more heavily streaked. The tail is mainly green, with contrasting white tips, especially on the outer feathers. The sexes are similar in plumage. Juveniles are duller and may show a more noticeable scaly appearance on the head and upperparts.
Range and Habitat
The White-tipped Sicklebill occurs from Costa Rica and Panama through Colombia and Ecuador to northern Peru. Some distributional treatments also recognise records from Venezuela. It is not considered migratory and generally remains within its regional range throughout the year.
It inhabits humid lowland and foothill forest, wet montane forest, older second-growth vegetation, forest edges and riverine growth. It is frequently associated with dense understorey and stands of Heliconia, wild plantains and other plants with long or curved floral tubes. It has been recorded from near sea level to approximately 2,100 metres in parts of its range, although it is often encountered at lower elevations.
The species is represented by several recognised subspecies, and regional differences in plumage, bill shape and tail pattern have been reported across its broad range.
Where to See This Species
Canandé Reserve, Esmeraldas Province, Ecuador
Canandé Reserve protects humid Chocó forest and maintains a documented bird checklist that includes the White-tipped Sicklebill. The reserve’s forest trails, flowering understorey and intact wet-forest habitat provide suitable conditions for searching quietly beneath Heliconia and other tubular flowers. The bird may be difficult to locate because it is fast-moving and often remains in shaded vegetation.
Nearby accommodation: The reserve provides lodge-style accommodation, with additional guest houses and small hotels available in the wider Quinindé area.
Narupa Reserve, Napo Province, Ecuador
The White-tipped Sicklebill is included on the Narupa Reserve bird checklist. This foothill reserve contains humid eastern-Andean forest and dense understorey, making it a realistic location for observing the species while walking forest trails or watching flowering plants. Early morning and periods of active flowering are sensible times to search, although the species can be unobtrusive.
Nearby accommodation: Lodge accommodation is available in and around the reserve, with further hotels, guest houses and self-catering options in Archidona and Tena.
Embalse Peñol-Guatapé, Antioquia, Colombia
White-tipped Sicklebills have been documented around Embalse Peñol-Guatapé. The reservoir is surrounded by forested hills, gardens and patches of humid vegetation, where the species may occur around flowering plants and wooded edges. Searches are most productive in quieter, well-vegetated areas rather than heavily developed waterfront sites.
Nearby accommodation: Guatapé is the main accommodation centre, offering hotels, guest houses, cabins and self-catering properties.
Behaviour and Diet
The White-tipped Sicklebill is usually encountered alone. It is active in the shaded forest understorey and may move rapidly between flowering plants. Like other hermit hummingbirds, it may follow a regular feeding route, revisiting dependable flower patches rather than defending a small feeding territory continuously.
Its curved bill is particularly suited to extracting nectar from flowers with deep or sharply curved corollas, including Heliconia and related plants. It also takes small insects and other arthropods, which provide protein and other nutrients. While feeding, the bird may transfer pollen between flowers, contributing to pollination in the forest understorey.
Breeding information is less complete than for many common hummingbirds. The female builds a small cup-shaped nest, usually beneath or attached to the underside of a leaf, using plant fibres and spider web. Two eggs are normally laid, and the female undertakes incubation and care of the young.
Identification Tips
- Look first for the extremely downcurved, sickle-shaped bill, which is unlike that of most hummingbirds.
- Note the dark green or bronze-green upperparts, heavily streaked throat and breast, and paler streaked underparts.
- The white tips of the tail feathers are conspicuous when the bird perches or changes direction in flight.
- The species is often found in dark forest understorey near Heliconia and other tubular flowers.
- It is generally fast-moving and may disappear into vegetation quickly, so listening for movement and watching favoured flowering patches can be more effective than scanning open spaces.
- The similar Buff-tailed Sicklebill (Eutoxeres condamini) can overlap with it in parts of the northern Andes. The White-tipped Sicklebill has a more northerly distribution and relatively clean white tail tips, whereas the Buff-tailed Sicklebill shows more extensive buff colouring on the outer tail feathers.
Conservation Status
The White-tipped Sicklebill is currently assessed as Least Concern on the IUCN Red List. BirdLife International reports a decreasing population trend, although the species has a very large range and is not currently considered to be declining rapidly enough to qualify for a threatened category.
The principal concerns are the loss and fragmentation of humid forest caused by deforestation, agricultural expansion, roads, mining and other development. Protecting continuous forest, maintaining shaded river corridors and conserving flowering understorey vegetation are important measures for the species and the wider communities of pollinators and plants with which it interacts.
Frequently Asked Questions
Where does the White-tipped Sicklebill live?
It lives in humid tropical forest, foothill forest, wet montane forest, older second growth and forest edges from Costa Rica and Panama through Colombia and Ecuador to northern Peru. Some sources also recognise records from Venezuela.
What does the White-tipped Sicklebill eat?
It feeds mainly on nectar from deep or curved flowers, especially Heliconia and related plants. It also takes small insects and other arthropods.
Why is the White-tipped Sicklebill’s bill curved?
The strongly curved bill helps the bird reach nectar in long or curved floral tubes that are difficult for many other nectar-feeding birds to exploit.
Is the White-tipped Sicklebill migratory?
No. It is regarded as a resident species rather than a regular long-distance migrant, although local movements may occur as birds follow flowering resources.
How can the White-tipped Sicklebill be identified?
The combination of a sharply downcurved bill, dark green upperparts, a streaked blackish throat and breast, and white-tipped tail feathers is distinctive. It is usually seen in shaded forest understorey.
Is the White-tipped Sicklebill endangered?
It is currently classified as Least Concern. However, its population trend is considered to be decreasing, and continued loss of humid forest remains a significant conservation concern.
References
- BirdLife International
- IUCN Red List of Threatened Species
- Fundación de Conservación Jocotoco
Related posts
