General characteristics The Lesser Sunda island of Sumba, like the Northern Nusa Tenggara EBA (EBA 162), is in Nusa Tenggara Timur province of Indonesia. It is a hilly island, with deeply dissected plateaus, but there is little land above 1,000 m and the highest peak only reaches 1,225 m. Sumba has a seasonal climate because it lies in the rain-shadow of the Australian continent and receives little rain in the south-east monsoon between April and November.
The major natural vegetation type is deciduous monsoon forest, but there are pockets of tropical semi-evergreen rain forest where the south-facing sides of the hills receive moderately high rainfall from onshore winds, some evergreen gallery forest in wet depressions and gullies, and montane forest above c.800 m (FAO 1982c, Whitmore 1984). Much of the island is now covered in dry grassland and savanna woodland as a result of forest clearance and the practice of burning in the dry season (FAO 1982c).

Restricted-range species Turnix everetti is found in open grassland, but otherwise the restricted-range species are all birds of forest or woodland. Recent ornithological survey work on Sumba by Jones et al. (1995a) has greatly improved knowledge of the habitat requirements and conservation status of these species. Most of them were found in all forest types, in both primary and secondary forest, and were estimated to have large populations on the island. The exceptions are Ptilinopus dohertyi (a Sumba endemic) and Zoothera dohertyi, which are associated with primary forest in the higher parts of the island, and Aceros everetti (a Sumba endemic), which prefers primary and mature secondary semi-evergreen rain forest in the lowlands. Two further Sumba endemics, Turnix everetti and Ninox rudolfi, were not recorded frequently enough during the survey work to permit a full assessment of their habitat requirements and conservation status…..
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