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Message: <blockquote data-quote="Paul Leader" data-source="post: 2428140" data-attributes="member: 108560"><p>The situation in Hong Kong (where it is a passage migrant only) may be of interest. In autumn borealis (s.s.) is the only taxon proven to occur. This is based on DNA analysis of trapped birds and the fact that only the 'single' call note is heard in autumn. In spring xanthrodryas predominates (based on singing birds and predominace of 'double' note call) with borelis being much rarer. There are no records as yet of examinandus. This fits with a well established pattern in HK of south-east Asian wintering passerines predominating in autumn and Philippine wintering taxa predominating in spring.</p></blockquote><p></p>