Published in HBW Volume 10 on page 519 (right).
Original HBW caption:
For much of their taxonomic history the Rufous-throated Thrush (Turdus ruficollis) and the Black-throated Thrush have been lumped as a single species, the “Dark-throated Thrush”. Although they freely interbreed where their ranges meet, producing fertile offspring, they are retained as separate species on the grounds that the hybrid zone is relatively narrow, and either side of this zone the two forms are immediately identifiable by a range of vocal and phenotypic characters, not least the colour of their throats.
This Field Guide describes and illustrates all the species and subspecies of birds in Macaronesia (the Azores, Madeira, the Savage Islands, the Canary Islands and Cape Verde). Special features include detailed distribution maps, species status for each archipelago and the official list of the birds of Macaronesia compiled by the S.O.C. (Canary Islands Ornithological Society).
CitationHanne and Jens Eriksen, IBC1005168. Accessible at hbw.com/ibc/1005168.
Hanne and Jens Eriksen, IBC1005168. Photo of Black-throated Thrush Turdus atrogularis at Sayh Plateau, Oman. Accessible at hbw.com/ibc/1005168.
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