Occasional hybridization with M. milvus reported#R#R. Several of current races frequently awarded separate species status, most notably lineatus and aegyptius (latter incorporating parasitus), but intergradation suggests probably best regarded as a single species, with several well-marked races; molecular study provisionally finds lineatus nested within migrans clade, and, although it shows that yellow-billed populations belonging to aegyptius and parasitus form a separate clade, more work is needed to help to clarify sister relationships within the group#R. Race formosanus appears barely diagnosable and may be better included in govinda. Other proposed races are tenebrosus (Ghana), subsumed within parasitus; tianshanicus (Tien Shan), included in lineatus; and arabicus (SW Arabia), synonymized with aegyptius. Seven subspecies currently recognized.
Food and feeding
Status and conservation
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