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  1. B

    Raptor in Thailand - West of Bangkok earlier this morning

    I'm not really sure what you mean by "number 3 under the nominate subspecies". Basically: if two or more populations of a species drift apart from each other (genetically), then at one point you could describe it as a subspecies or a new species, depending on how far apart they are genetically...
  2. B

    Raptor in Thailand - West of Bangkok earlier this morning

    I don't use e-bird to report birds, but probably: 1) Just the species, without mentioning a subspecies (Milvus migrans) 2) Nominate subspecies (Milvus migrans migrans) 3) Black-eared subspecies (Milvus migrans lineatus)
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