Published in HBW Volume 11 on page 417 (above).
Original HBW caption:
Socotra, a small island in the mouth of the Gulf of Aden, boasts two endemic species of cisticolid. The Socotra Warbler and the Socotra Cisticola (Cisticola haesitatus) are restricted-range species, but neither is treated as globally threatened, although the cisticola is Near-threatened. Recent surveys have shown that the Socotra Warbler is fairly common throughout grassland, scrubby dunes, slopes and wadis, as well as in arid woodland on higher mountain slopes; its population is thought to exceed 5000 birds. This species is particularly interesting as it is morphologically unique and treated as a monospecific genus. The Socotra Cisticola is also fairly common and widespread in coastal lowlands, occurring at fairly high densities in Croton scrub. The total population is thought to exceed 4000 birds. The survival of these species depends on the careful management of Socotra’s landscapes and habitats.