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The Gulf of Guinea thrush Turdus olivaceofuscus is endemic to the islands of São Tomé (nominate olivaceofuscus) and Príncipe (subspecies xanthorhynchus). Relationships between the two island taxa, originally described as two different species, are uncertain. This problem has been difficult to resolve due to the scarcity of information from Príncipe birds. A focused effort to find birds from Príncipe...
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