Number observed: 1
Comments: 2cy bird together with scruffy looking CAGU, MEGU and GWGU. Overall very pale individual with ragged primaries. Flew a few meters after flushed by ferry: primaries all equally pale without any lighter window formed by darker outer and paler inner primaries. In size more or less like CAGU. Typical headshape seen ('friendly face') with small bill (all dark). Did not seem to be actively moulting (yet). I am aware of the rarity of this species in this time of the year, hence the reason I ebirded it.