Assertion: martin's house | /r/HasProperty | martin delichon dasypus
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text: Expecting it to be an Asian House Martin Delichon dasypus (a local and rather uncommon migrant to South Korea), closer examination of the bird revealed some unexpected features: the rump, although fluffed up, looked much too extensive and clean white (lacking the dark streaking typical of Asian House), and the tail looked rather neatly forked - deeper than most Asian’s.