Small Kinmen 小金門
24-3-2011
The bird was seen more than 15 minutes. It seems some yellow feather on its rump, different from the Hong Kong one? Is it the same Owstoni species?
Shek Kong-Hong Kong 香港,石崗
13-4-2011
Author: thinfor Time: 17/04/2011 08:56
Just my guess. The one you saw in Kinmen may be a male Green-backed Flycatcher (綠背姬鶲) that should be split into another subspecies.
Any other experienced birders please comment and thank you for sharing your great photos. Author: ltsunpun Time: 21/04/2011 20:01
With reference to the Birds of Hong Kong & South China,. The bird in MBill’s photo is not Green Backed Flycatcher, it has a long supercilium, whereas supercilium of Green Backed Flycatcher is very short, do not extend to the back of the eye.
I also visited BirdsKorea.Organization the following website, a study report talking about the identification of Narcissus Flycatcher :
I am not an expert, I am not able to 100% fully understand the content of the report. However, the study report said the Narcissus Flycatcher is presently considered to contain three distinctive subspecies – nominate narcissina Black backed, owstoni Olive-backed and elisae Green-backed,
Appendix of the Study Report provided tables with Summary of Identification Feature, the bird photo by MBill is a full adult male, so Full Adult Males (Table 2) of the Appendix is selected for identification purpose, finally I would suggest the bird is an owstoni Olive-backed for the following reasons:
- No prominent eye-ring (elisae has prominent, yellow eye-ring)
- Mantle and crown vary from moss or olive-green to blackish green (narcissina’s mantle and crown is black in color.)
- Distinct yellow supercilium (narcissina’s supercilium is also distinct but orange-yellow; elisae usually has indistinct supercilium)
- Yellow throat (narcissina’s throat is fiery orange)
I agree with your assessment tpluk, and I agree that this bird is an adult male owstoni.
Note that, elisae is treated as a different species in Hong Kong (unlike Birds Korea) and that owstoni may also be split in future. Author: ltsunpun Time: 22/04/2011 19:49
John, thank you. I have used a lot of time to read through the long report (about 30 pages), perhaps this is my reward.
tpluk
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