Introduction
The Band-tailed Barbthroat (Threnetes ruckeri) is a medium-sized hermit hummingbird of humid forests in Central America and north-western South America. It is recognised by its long, slightly downcurved bill, dark throat and contrasting tail pattern. Like other hummingbirds, it feeds mainly on nectar and also takes small arthropods.
Physical Description
The Band-tailed Barbthroat measures approximately 11–12 cm in length. Its upperparts are generally bronzy green, while the underparts vary geographically from greyish to buffy or cinnamon-tinged. The throat is usually dark and contrasts with the paler breast.
The long, slightly decurved bill is well suited to feeding from tubular flowers. The lower mandible is often yellowish or orange. The rounded tail has contrasting pale bases and tips to the outer feathers, creating a conspicuous pale band near the end of the tail, especially when the bird is in flight or fans its tail.
Males and females are broadly similar in appearance, although individual plumage can vary with age, sex and subspecies. Young birds may show less strongly developed throat and breast colouration than adults.
Range and Habitat
The species occurs from south-eastern Guatemala and Belize through eastern and western Panama to Colombia, western Ecuador and north-western Venezuela. It is generally regarded as resident rather than migratory, although local movements may occur in response to food availability and seasonal conditions.
Band-tailed Barbthroats favour humid lowland and foothill forests, including primary forest, mature secondary growth, forest edges and shaded streamside vegetation. They are usually found in the dense understory, particularly where Heliconia, palms and other flowering plants provide feeding opportunities. The species may occur from the lowlands into lower foothill elevations, but it is principally associated with warm, humid forest environments.
Geographic variation is reflected in differences in underpart and tail colouration. Several subspecies have been described, although taxonomic treatments have varied over time.
Where to See This Species
La Selva Biological Station, Heredia Province, Costa Rica
La Selva protects extensive Caribbean lowland rainforest with shaded trails, streams and dense understory vegetation. The Band-tailed Barbthroat is documented from the station and is most likely to be encountered in forest interior and edge habitat, especially around flowering plants. It can be unobtrusive, so patient observation and attention to low perches are useful.
Nearby accommodation: Accommodation is available at the biological station for visitors where permitted, with additional lodges, guest houses and hotels in the nearby Puerto Viejo de Sarapiquí area.
Pipeline Road, Soberanía National Park, Panama
Pipeline Road passes through a varied mosaic of lowland rainforest, secondary forest, swamps and streamside habitat in Soberanía National Park. The Band-tailed Barbthroat is recorded along the road and around the Rainforest Discovery Center area, where Heliconia and other understory flowers may attract feeding birds.
Nearby accommodation: The main gateway areas are Gamboa and the Panama Canal zone, where visitors can find hotels, lodges and rainforest accommodation.
San Cipriano–Escalerete Nature Reserve, Valle del Cauca, Colombia
This publicly visited forest area on Colombia’s Pacific slope supports humid lowland rainforest and dense streamside vegetation, including suitable habitat for the species. Band-tailed Barbthroats have been documented in the reserve and surrounding San Cipriano forest, where local guides can improve the chances of finding this quiet understory hummingbird.
Nearby accommodation: Basic guest houses, cabins and small lodgings are available in San Cipriano, with a wider choice of hotels and guest houses in Buenaventura.
Behaviour and Diet
The Band-tailed Barbthroat is usually encountered alone and often perches quietly in shaded vegetation at low or medium height. Its subdued colours and preference for dense understory can make it difficult to detect, even where it is present.
It feeds on nectar from a range of tubular flowers and may follow regular circuits between flowering plants. The long bill allows it to exploit flowers with deep corollas. Small insects and other arthropods are also taken, providing an important source of protein, particularly during breeding.
Males may defend feeding areas and take part in aerial or vocal displays during courtship. The species is not known for long-distance migration, but its movements may vary locally with flowering conditions.
Breeding information remains limited across much of the range. The female builds a small nest from plant fibres and other soft materials, often incorporating spider silk, and attaches it beneath a broad or drooping leaf. The female normally undertakes incubation and cares for the young, although occasional observations suggest that adult behaviour at the nest may be more complex than previously assumed.
Identification Tips
Look for a medium-sized, long-billed hummingbird in the shaded forest understory. The most useful field marks are:
- A long, slightly downcurved bill, often with a yellowish or orange lower mandible.
- Bronzy green upperparts.
- A dark throat contrasting with a greyish, buffy or cinnamon-tinged breast.
- A rounded tail with contrasting pale areas that form a band-like pattern near the tip.
- A preference for low perches, dense vegetation and forest edges rather than exposed canopy positions.
The tail pattern is particularly helpful when the bird fans its tail or moves through a patch of light. It should not be confused with the Pale-tailed Barbthroat, which has a different overall tail pattern and occupies a largely South American range. The Band-tailed Barbthroat can also be separated from sicklebills by its less strongly curved bill and distinctive contrasting tail markings.
Conservation Status
The Band-tailed Barbthroat is currently assessed as Least Concern on the IUCN Red List. Its global population has not been reliably quantified, and the overall population trend is not well known.
The species occupies a broad geographic range, but local populations may be affected by deforestation, forest fragmentation, agricultural expansion and the degradation of humid lowland and foothill forests. Maintaining connected forest, streamside vegetation and flowering understory plants is important for its long-term conservation.
Frequently Asked Questions
Where does the Band-tailed Barbthroat live?
It occurs in humid forests from south-eastern Guatemala and Belize through Panama, Colombia, western Ecuador and north-western Venezuela.
Is the Band-tailed Barbthroat migratory?
It is generally considered resident. Local movements may occur, but it is not known as a long-distance migrant.
What does the Band-tailed Barbthroat eat?
Its diet consists mainly of nectar, supplemented by small insects and other arthropods.
How can the species be identified?
Look for a long, slightly downcurved bill, bronzy green upperparts, a dark throat and a rounded tail with contrasting pale markings near the tip.
Where is the best habitat for finding this hummingbird?
Search humid lowland and foothill forest, especially shaded understory, stream edges, forest margins and areas with Heliconia or other tubular flowers.
Is the Band-tailed Barbthroat threatened?
It is currently listed as Least Concern, although habitat loss and forest fragmentation can affect local populations.
References
- BirdLife International
- IUCN Red List of Threatened Species
- IOC World Bird List
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