HKBWS BBS 香 港 觀 鳥 會 新 聞 組    Discussion Area 討論區    Photo Gallery 相片分享 I (Moderators: Forrest FONG, BBS Moderators, Kwok Jai, carmen, George_Ho)    Crested Serpent Eagle 蛇鵰 « Previous topic | Next topic » Pages: 1  Reply Send Topic Print    Author  Topic: Crested Serpent Eagle 蛇鵰  (Read 713 times) Daniel CK Chan BBS Member BBS God I love nature photography!     Gender: Posts: 794 Crested Serpent Eagle 蛇鵰 « on: Jul 30th, 2003, 11:51pm » Quote Modify 071 Crested Serpent Eagle 蛇鵰 Tsim Bei Tsui 尖鼻咀 05/7/2003 Canon EOS10D, 1/640, f5.6, +1, ISO200, 50% Full Frame http://www.danielckchan.com/b20030273-0600.jpg   « Last Edit: May 20th, 2004, 2:51pm by BBS Moderators » Logged Daniel CK Chan http://www.danielckchan.com Mike Kilburn Guest Re: Crested Serpent Eagle ?? « Reply #1 on: Aug 1st, 2003, 9:36am » Quote Modify Remove congratulations Daniel!  I haven't seen the Ng Tung Chai bird on its perch for some time, but with such a good flight shot doesn't really matter-la!   Mike Logged KK Hui BBS Member BBS God Bird Photography - at its best ...     Posts: 940 Re: Crested Serpent Eagle 蛇鵰 « Reply #2 on: Aug 1st, 2003, 4:57pm » Quote Modify Excellent shot, Daniel!     500 + 1.4x ??   Best kk -------------- www.geocities.com/kkhui_001 « Last Edit: Aug 1st, 2003, 4:58pm by KK Hui » Logged Daniel CK Chan BBS Member BBS God I love nature photography!     Gender: Posts: 794 Re: Crested Serpent Eagle ?? « Reply #3 on: Aug 1st, 2003, 11:07pm » Quote Modify on Aug 1st, 2003, 9:36am, Mike Kilburn wrote: congratulations Daniel!  I haven't seen the Ng Tung Chai bird on its perch for some time, but with such a good flight shot doesn't really matter-la!   Mike Mike,   Thanks. Would it be a 1st or 2nd year immature bird?   KK,   The photo is shot with 500+1.4+Wimberley Head.   Daniel Logged Daniel CK Chan http://www.danielckchan.com Mike Kilburn Guest Re: Crested Serpent Eagle ?? « Reply #4 on: Aug 2nd, 2003, 10:12am » Quote Modify Remove I'm not an expert on aging raprtors, but in the photo you can see that it is moulting its inner primaries.  These new feathers have a  contrasting strong black tip and a broad white band across the feathers.   When they grow to full length this will become the classic broad white bar with a black border along the rear edge of the wing which is the diagnostic feature for flying CSEagle.     However the feathers which are not yet moulted have narrower brown lines and the tips are no so dark. This is typical juvenile plumage.   I do not know how long this plumage is retained and would welcome the opinions of others, especially those who know about the moult strategies of eagles.   You can also see that the spotting on the breast and belly is well defined as an adult would show, but raptors moult these feathers first and then replace their fligth feathers during the summer.     "Birds of Prey in Japan" states that juvile plumage is replaced by full adult plumage by the end of the autumn of the second calendar year.  This would correspond with the plumage of this bird. so my guess (I stress Guess!) is that it is a second year bird which will be in full adult plumage by the end of the year!     Cheers   Mike Logged Daniel CK Chan BBS Member BBS God I love nature photography!     Gender: Posts: 794 Re: Crested Serpent Eagle ?? « Reply #5 on: Aug 2nd, 2003, 11:28am » Quote Modify on Aug 2nd, 2003, 10:12am, Mike Kilburn wrote: I'm not an expert on aging raprtors, but in the photo you can see that it is moulting its inner primaries.  These new feathers have a  contrasting strong black tip and a broad white band across the feathers.   When they grow to full length this will become the classic broad white bar with a black border along the rear edge of the wing which is the diagnostic feature for flying CSEagle.     However the feathers which are not yet moulted have narrower brown lines and the tips are no so dark. This is typical juvenile plumage.   I do not know how long this plumage is retained and would welcome the opinions of others, especially those who know about the moult strategies of eagles.   You can also see that the spotting on the breast and belly is well defined as an adult would show, but raptors moult these feathers first and then replace their fligth feathers during the summer.     "Birds of Prey in Japan" states that juvile plumage is replaced by full adult plumage by the end of the autumn of the second calendar year.  This would correspond with the plumage of this bird. so my guess (I stress Guess!) is that it is a second year bird which will be in full adult plumage by the end of the year!     Cheers   Mike Many thanks for your informative explanations. If your guess is true, I strongly want to see or take photos of him/her again by the end of this year when he shall show his/her beautiful full adult plumage. ::) « Last Edit: Aug 2nd, 2003, 11:30am by Daniel CK Chan » Logged Daniel CK Chan http://www.danielckchan.com 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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