HKBWS BBS 香 港 觀 鳥 會 新 聞 組    Discussion Area 討論區    Bird Identification 鳥類辨識 (Moderators: Yat-tung YU, BBS Moderators)    Is this a Yellow-streakd Warbler or Radde's Warble « Previous topic | Next topic » Pages: 1  Reply Send Topic Print    Author  Topic: Is this a Yellow-streakd Warbler or Radde's Warble  (Read 670 times) PL BBS Member BBS Senior Member I love bird watching!     Gender: Posts: 65 Is this a Yellow-streakd Warbler or Radde's Warble « on: Jan 5th, 2006, 4:18am » Quote Modify Tseng Lan Shue 井欄樹   2005-12-25   Sigma SD-10, 50-500mm     Can't ID this Warbler, it look like a Yellow-streaked Warbler or Radde's Warbler.   Thanks for you help!   Percy Logged Mike Kilburn Committee Member BBS God     Posts: 334 Re: Is this a Yellow-streakd Warbler or Radde's Wa « Reply #1 on: Jan 6th, 2006, 1:10am » Quote Modify This looks like a tyical Dusky Warbler to me.   Why ?   1.  The breast looks very dark - right for Dusky, not for Radde's or Yellow-streaked   2. Slender pointed bill - typical of Dusky , not for Radde's which is shorter, thicker and more curved on the top, Yellow-streaked can be as slender as Dusky but can also be shorter   3.  Supercilium - long thin and straight, and all the same colour  Radde's shows a slightly broader supercilium, especially in front of the eye. This part of the supercilium often shows a rufous tinge, and the rest is not usually so pale as Dusky.     There are other features, but these are three good indicators.   It should be noted that there are some Yellow-streaked Warblers in particular which are very difficult to identify with certainty, but good clear pix like these make the job of comparison much easier.   For a detailed discussion of this difficult group see the 1994 Hong Kong Bird Report paper by Paul Leader (pp170 - 180)   Cheers Mike K     Logged Mike Kilburn Vice Chairman Chairman - ConservationCommittee HKBWS PL BBS Member BBS Senior Member I love bird watching!     Gender: Posts: 65 Re: Dusky Warbler « Reply #2 on: Jan 6th, 2006, 2:39am » Quote Modify Mike,   Thanks for the ID!   What make me think of Radde's or Yellow-streaked is the end of the supercilium curved downward. Here another photo show it more clear.     Percy Logged Andrew BBS Member BBS God     Gender: Posts: 218 Re: Is this a Yellow-streakd Warbler or Radde's Wa « Reply #3 on: Jan 6th, 2006, 7:55am » Quote Modify Mike, did you ever look at the picture of "Dusky" that I posted that started my Ho Chung thread and if so did you share Paul's views that it was possibly Yellow-streaked?   regards   Andrew Logged Mike Kilburn Committee Member BBS God     Posts: 334 Re: Is this a Yellow-streakd Warbler or Radde's Wa « Reply #4 on: Jan 6th, 2006, 8:06am » Quote Modify Hi Percy     Thanks for the extra photo   This is a good example of why you need to consider more than one feature in hard to identify groups like phylloscopus warblers, an also how different photos of the same bird can show different features.   Although the angle of the second photo makes the bill look shorter and  more curved, I think it is justthe angle - front-on and slightly above should make it look shorter and broader.   Inthis picture you can also see the thin legs which are typical for Dusky and less so for Radde's (Yellow-throated is again somewhere in between).   Cheers   Mike K Logged Mike Kilburn Vice Chairman Chairman - ConservationCommittee HKBWS PL BBS Member BBS Senior Member I love bird watching!     Gender: Posts: 65 Re: Is this a Yellow-streakd Warbler or Radde's Wa « Reply #5 on: Jan 6th, 2006, 6:26pm » Quote Modify Hi Mike,   Thanks again for you explanation and the ID.   Percy Logged Pages: 1  Reply Send Topic Print Forum Jump: ----------------------------- Announcement 簡訊通告 -----------------------------  - Membership Affair 會員事務   - Outings / Activities 戶外活動 / 講座   - Projects 項目計劃   - Crested Bulbul Club 紅耳鵯俱樂部 ----------------------------- Discussion Area 討論區 -----------------------------  - General 一般問題   - Conservation 自然保育 => Bird Identification 鳥類辨識   - Birding Reports & Tips 觀鳥報告及心得   - Photo Gallery 相片分享 I   - Photo Gallery 相片分享 II ----------------------------- Special Topics 特別主題 -----------------------------  - Wild Birds & Avian Flu 野鳥與禽流感   - Sustainable Management Scheme in Long Valley 塱原可持續生態管理計劃   - Black-faced Spoonbill 黑臉琵鷺   - Goodbye Penfold 告別彭福   - Tern Conservation 燕鷗保育   - Black-eared Kite 鳶(麻鷹)   - Swifts and Swallows 燕與雨燕   - China Birdwatching Network 中國觀鳥活動網絡   - Winter Altas Survey 冬季鳥類普查   - Nature Conservation Policy 自然保育政策 ----------------------------- Knowledge Sharing 知識分享 -----------------------------  - FAQ 常見問題   - Archive 資料重溫 « Previous topic | Next topic »

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