Language: English Updated: 2025-11-17

Bahama swallow

The Bahama swallow (Tachycineta cyaneoviridis) is a medium-sized passerine bird in the swallow family Hirundinidae. It is endemic to the Bahamas and is known for its iridescent plumage and distinctive flight patterns.

Etymology and Taxonomy

The common name "Bahama swallow" directly refers to its primary geographic distribution. Its scientific name, Tachycineta cyaneoviridis, is derived from Ancient Greek and Latin:

  • Tachycineta: From Greek takhus (swift) and kinetos (moving), referring to its agile flight.
  • Cyaneoviridis: From Latin cyaneus (dark blue or greenish-blue) and viridis (green), describing its prominent coloration.

The Bahama swallow is part of the genus Tachycineta, which includes other species of tree swallows found in the Americas, such as the [[Violet-green swallow]] and the [[Tree swallow]].

Description

The Bahama swallow measures approximately 12–14 cm (4.7–5.5 in) in length. It exhibits a striking iridescent metallic green on its upperparts, which can appear bluish in certain light. A distinct feature is the coppery-bronze sheen on its back and rump. The underparts are pure white, contrasting sharply with its dark, deeply forked tail and dark wings. The iris is dark, and the bill and legs are black. Males and females are generally similar in appearance, though males may have slightly brighter iridescence. Juveniles are duller, with a more muted green or brownish-green on their upperparts and a less pronounced fork in the tail.

Distribution and Habitat

The Bahama swallow is an [[endemic species]] of the [[Bahamas]], where it breeds primarily in the [[pine forests]] of Grand Bahama, Abaco, New Providence, and Andros. It prefers open woodlands, especially those dominated by [[Caribbean pine]] (Pinus caribaea), often in proximity to freshwater or coastal areas.

During the non-breeding season, a significant portion of the population undertakes a partial migration. Many individuals migrate south to [[Cuba]] and occasionally to [[Hispaniola]] (Haiti and Dominican Republic), where they can be found in a wider range of habitats, including coastal areas, mangroves, and open country. Some individuals may remain in the Bahamas year-round.

Behavior and Ecology

Diet and Foraging

Like all swallows, the Bahama swallow is an [[insectivore]]. It forages primarily on flying insects, catching them in agile aerial pursuits. Its diet includes various species of flies, beetles, ants, and wasps. They are typically observed foraging over open areas, forests, and water bodies.

Breeding

The breeding season for the Bahama swallow typically runs from April to July. They are [[cavity nesters]], utilizing natural tree cavities or old woodpecker holes in dead or decaying pine trees. They may also use artificial nest boxes if available. The nest itself is a cup-shaped structure made of grasses, twigs, and feathers, often lined with softer materials. Females typically lay 2-4 white eggs. Both parents participate in feeding the young.

Vocalization

The Bahama swallow's calls include a high-pitched, twittering song, often given in flight. Alarm calls are sharper and more insistent.

Conservation Status

The Bahama swallow is classified as [[Near Threatened]] by the [[International Union for Conservation of Nature]] (IUCN) on its Red List. The primary threats to the species include:

  • Habitat Loss and Degradation: Extensive logging of mature pine forests, particularly on Grand Bahama and Abaco, directly reduces available nesting sites. Development for tourism and residential areas also contributes to habitat fragmentation and destruction.
  • Intensified Hurricanes: The Bahamas are highly susceptible to powerful hurricanes, which can cause widespread destruction of pine forests, impacting breeding success and overall population numbers. For example, Hurricane Dorian in 2019 had a significant impact on its core habitat.
  • Competition for Nest Sites: Competition with other cavity-nesting species, including introduced species, can limit breeding opportunities.
  • Climate Change: Changes in weather patterns and sea-level rise may further impact its habitat and prey availability.

Conservation efforts focus on protecting and restoring pine forests, promoting sustainable forestry practices, and potentially installing artificial nest boxes in suitable areas. Monitoring population trends is crucial for informing conservation strategies.

References

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