Many thanks to the Records Committee for keeping the Hong Kong's list and records up to date; and thanks for raising the issue on feather damage for discussion. This is a really long-awaited discussion topic, as we often find birds that have damaged feathers.
Here are 2 examples:
This female Green-backed Flycatcher, which stayed at Po Toi from March to April09, had damaged tail feahters. Is it considered as a Cat. A bird ?
Po Toi, 29/03/09
This female Narcissus Flycatcher, which was found on 31Mar by Brenda and Lam, had no tail. Is it considered as a wild bird?
Po Toi, 31/03/09
Looking forward to opinions of expert bird watchers.