Introduction
The Ashy-tailed Swift (Chaetura andrei), also known as André’s Swift, is a small, poorly known member of the swift family, Apodidae. It is recognised as a distinct species by major modern taxonomic lists and is endemic to northern and central Venezuela. Much of its biology remains uncertain because it is difficult to separate from similar Chaetura swifts in flight and has been the subject of limited field study.
Physical Description
The Ashy-tailed Swift is a small swift measuring approximately 11 centimetres in length. It has long, pointed wings, a compact body and a short, stiff, spiny tail suited to life on the wing and clinging to vertical surfaces.
The plumage is generally greyish brown, with paler underparts and a relatively pale rump and tail area. The throat and lower body may appear browner than those of the similar Vaux’s Swift, while the back is comparatively lighter. Sexes are not known to show obvious plumage differences, and reliable age-related distinctions have not been well documented.
Range and Habitat
The Ashy-tailed Swift is endemic to Venezuela, with records concentrated in the northern and central parts of the country, including the eastern lowlands, the Orinoco region and parts of the eastern Coastal Range. Older literature sometimes included populations from other South American countries under Chaetura andrei, but many of those birds are now treated as Sick’s Swift (Chaetura meridionalis) or other taxa.
It has been associated with deciduous and semi-deciduous woodland, forest edges, riverine forest and other open areas above or near forest. Records from Henri Pittier National Park indicate that it may occur over both semi-deciduous and riparian woodland. The species is usually encountered in flight, and its precise habitat requirements and elevational range remain incompletely documented.
Where to See This Species
Henri Pittier National Park, Aragua and Carabobo, Venezuela
The Ashy-tailed Swift has been documented in Henri Pittier National Park, where it has been observed flying over semi-deciduous and riparian forest. The park’s varied woodland, forest-edge and river-valley habitats make it one of the better documented public places to look for the species, although sightings remain difficult and identification requires care because several similar swifts occur in the region.
Nearby accommodation: Maracay is the most practical gateway, with hotels, guest houses and other visitor accommodation, while smaller accommodation is also available in settlements near park access points.
Behaviour and Diet
Very little is known about the behaviour of the Ashy-tailed Swift. Like other Chaetura swifts, it is highly aerial and spends much of its active time flying. It may occur alone or in small groups, but claims of regular large flocks and elaborate synchronised displays have not been adequately established for this species.
It is considered an aerial insectivore. Flying insects are the most likely principal food, and spiders may also be taken, but detailed studies of its diet are lacking. The species’ breeding season, nest site, clutch size, incubation period and parental care have not been reliably documented. The previously reported figures for egg number, incubation and fledging should therefore not be treated as confirmed facts for the Ashy-tailed Swift.
Identification Tips
- Look for a small, fast-flying swift with long, pointed wings and a short, stiff tail.
- Note the overall greyish-brown plumage, paler rump and somewhat browner throat and belly.
- The species is most likely to be seen over forest, river valleys and semi-open woodland rather than perched in the open.
- Distinguishing it from Vaux’s Swift and other small Chaetura swifts can be difficult, particularly in poor light or when birds are seen only from below.
- Identification should be based on a combination of range, habitat, structure, plumage and, where available, vocal evidence. Records outside Venezuela require especially careful scrutiny because several older range statements resulted from historical taxonomic treatments that included other species.
Conservation Status
The Ashy-tailed Swift is listed as Vulnerable on the IUCN Red List. It has a restricted distribution, a poorly known and potentially small population, and a declining trend is associated primarily with the loss and degradation of suitable forest habitat.
Protection of remaining semi-deciduous, riparian and lowland forest is important for the species. Further field surveys, photographic documentation, sound recording and genetic research are also needed to clarify its true distribution, population size, habitat requirements and relationship to similar swifts.
Frequently Asked Questions
Where is the Ashy-tailed Swift found?
It is endemic to northern and central Venezuela, where it has been recorded in forested lowlands, riverine woodland and parts of the eastern Coastal Range.
What does the Ashy-tailed Swift look like?
It is a small greyish-brown swift, about 11 centimetres long, with long pointed wings, a short stiff tail, a relatively pale rump and paler underparts.
What does the Ashy-tailed Swift eat?
It is an aerial insectivore. Flying insects are thought to make up most of its diet, and spiders may also be taken, although detailed dietary studies are unavailable.
Is the Ashy-tailed Swift endangered?
It is listed as Vulnerable. Its restricted Venezuelan range and continuing loss of forest habitat are the principal conservation concerns.
Where is the best place to look for this species?
Henri Pittier National Park in Venezuela is one of the better documented public sites. Search above semi-deciduous and riparian woodland, especially where open flight paths occur over forest.
Is the Ashy-tailed Swift the same as Vaux’s Swift?
No. It was formerly treated by some authorities as a form of Vaux’s Swift, but modern taxonomic treatments recognise the Venezuelan population as the distinct species Chaetura andrei. Similarity between the two species still makes field identification challenging.
References
- IOC World Bird List
- IUCN Red List of Threatened Species
- Birds of the World, Cornell Lab of Ornithology
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