||Hirondelle à queue blanche
||The BirdLife Taxonomic Working Group is aware that phylogenetic analyses have been published which have proposed generic rearrangements which may affect this species, but prefers to wait until work by other taxonomists reveals how these changes affect the entire groups involved.
||13 cm. Small swallow. Male deep, iridescent blue (appears black) above, white below, with white tail. Female and juvenile similar but white on tail much reduced, sometimes absent. Similar spp. No other swallow has completely white underparts and white tail. Voice High-pitched, swallow-like twittering. Hints Easily seen year-round at 20 km east of Yabello in southern Ethiopia.
|Red List Category & Criteria:
||Taylor, J. & Butchart, S.
||Borghesio, L., Collar, N., Mellanby, R. & Robertson, P.
||Butchart, S., Ekstrom, J., Pilgrim, J., Shutes, S., Starkey, M., Symes, A., Taylor, J.
This species is believed to have a small population, and is suspected to be declining owing to the intensification of land-use across much of its small range. It is therefore treated as Vulnerable, although there is little information on its population status and the seriousness of threats.
|Previously published Red List assessments:|
- 2008 – Vulnerable (VU) –
- 2006 – Vulnerable (VU) –
- 2004 – Vulnerable (VU) –
- 2000 – Vulnerable (VU) –
- 1996 – Vulnerable (VU) –
- 1994 – Vulnerable (VU) –
- 1988 – Threatened (T) –
|Range Description:||Hirundo megaensis has a restricted range around Mega and Yabello in southern Ethiopia. No survey-based population estimate has been made, but while one survey in 1989 suggested densities had remained constant through the 1980s, another established slightly larger geographical and altitudinal ranges but recorded lower numbers. Field surveys in 1996 found it to be fairly common in small numbers (P. Robertson in litt. 1998). Surveys in 2005 found less than two individuals per 15 minute point count or 500 m transect (R. Mellanby in litt. 2005). In June 2006 small numbers were observed on the Liben Plains east of Negele, c.120 km northeast of the previously-known range. Further sightings have since been made there in October-December 2006, February 2007 and January 2008 (Gabremichael et al. 2009). It is not yet confirmed to breed on the Liben Plains and has not been recorded there in April-May, but the spread in seasonality of sightings so far suggests that the species may prove to occur regularly in the area. The population is estimated to number less than 10,000 individuals because the species probably occurs at relatively low densities across its range, (N. J. Collar in litt. 2003), , although it is no longer believed to be dependent on termite mounds to nest as it has since been found to nest in traditional houses and wells.|
|♦ Continuing decline in area of occupancy (AOO):||Unknown|
|♦ Extreme fluctuations in area of occupancy (AOO):||No||♦ Estimated extent of occurrence (EOO) - km2:||14800|
|♦ Continuing decline in extent of occurrence (EOO):||Unknown||♦ Extreme fluctuations in extent of occurrence (EOO):||No|
|♦ Number of Locations:||11-100||♦ Continuing decline in number of locations:||Unknown|
|♦ Extreme fluctuations in the number of locations:||No||♦ Lower elevation limit (metres):||1500|
|♦ Upper elevation limit (metres):||1700|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||The population is estimated to number less than 10,000 individuals because the species probably exists at relatively low densities across its range, although it is no longer believed to be dependent on termite mounds to nest as it has since been found to nest in traditional houses and wells (N. J. Collar in litt. 2003). It is placed in the band 2,500-9,999 mature individuals, equating to 3,750-14,999 individuals, rounded here to 3,500-15,000 individuals.|
Trend Justification: The population is suspected to be in decline owing to changes in land use across much of the species's range, however the magnitude of this decline is unclear.
|Current Population Trend:||Decreasing|
|♦ Number of mature individuals:||2500-9999||♦ Continuing decline of mature individuals:||Yes|
|♦ Extreme fluctuations:||No||♦ Population severely fragmented:||No|
|♦ No. of subpopulations:||1||♦ Continuing decline in subpopulations:||Unknown|
|♦ Extreme fluctuations in subpopulations:||No||♦ All individuals in one subpopulation:||Yes|
|♦ No. of individuals in largest subpopulation:||100|