The Wheatear Oermnthe oenanthe and the Isabelline Wheatear O.isabellina have overlapping breeding and wintering ranges (Vaurie 1959) and frequently occur in the same habitat (Cornwallis 1975). Identification in these circumstances may be difficult, as Isabelline Wheatear and female Wheatear are notoriously similar. In a recent study of the two species in their winter quarters in West Africa,
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