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, Kwok Jai, George_Ho, BBS Moderators, carmen)    White-fronted Goose « Previous topic | Next topic » Pages: 1  Reply Send Topic Print    Author  Topic: White-fronted Goose  (Read 610 times) HKBWS Office BBS Member BBS God     Posts: 1316 White-fronted Goose « on: Nov 10th, 2004, 5:39pm » Quote Modify A juvenile White-fronted Goose was found at Lok Ma Chau on 8 November 2004. Please find below photo of the bird. The area is a Frontier Closed Area, it is also the KCRC private land. Access to the area is restricted.   Share with you this interesting information: Date: 9 November 2004 Time: 7:30am Equipment: Nikon Coolpix 4500 + Swarovski ATS 65HD         « Last Edit: Nov 10th, 2004, 9:18pm by HKBWS Office » Logged From the HKBWS Office KK Hui BBS Member BBS God Bird Photography - at its best ...     Posts: 940 Re: White-fronted Goose « Reply #1 on: Nov 10th, 2004, 7:18pm » Quote Modify Thanks for sharing these shots!     Why are we seeing mostly juveniles when it come to rare visitors?     KK Hui ARPS www.geocities.com/kkhui_001 Logged pippenho BBS Member BBS God I'm loving eat!     Gender: Posts: 644 Re: White-fronted Goose « Reply #2 on: Nov 10th, 2004, 7:49pm » Quote Modify on Nov 10th, 2004, 7:18pm, KK Hui wrote: Thanks for sharing these shots!     Why are we seeing mostly juveniles when it come to rare visitors?     KK Hui ARPS www.geocities.com/kkhui_001   小朋友貪玩易走失 Logged Betty BBS Member BBS God I love bird watching!     Gender: Posts: 154 Re: White-fronted Goose « Reply #3 on: Nov 10th, 2004, 9:05pm » Quote Modify See if quotation from the book "Birds & Weather- A Birdwatcher's Guide" by Stephen Moss can give us some hints.   " Migrants appear to use a variety of cues and mechanisms to find their way successfully. Some of these are inherited, others learned from experience. One inherited mechanism-vector navigation- is the main method used by juvenile and first-winter birds undertaking their first outward migration.   Vector navigation is similar to the 'point -and-compass' method used by early sailors. In practice, vector navigation is crude and not very effective- even the lightest of crosswinds would, if not corrected, send the bird many kilometres off course.     Over-reliance on the simpler method of vector navigation probably explains why such a high proportion of wind-drifted autumn vagrants are juveniles of first-winter birds, on their first outward journey. "   This also explains why they are rare visitors. They are off-course, this may not be their route. Adults have many other skills to compensate.   The above book has detail explanation, plus historical events & data to tell the whole story of migration. Very interesting. I borrowed it from public library. « Last Edit: Nov 10th, 2004, 10:02pm by Betty » Logged Anguslau BBS Member BBS God I love bird watching!     Posts: 402 Re: White-fronted Goose « Reply #4 on: Nov 11th, 2004, 11:22am » Quote Modify Thanks very much for the info, Betty. If I have the choice, I like the juveniles more than the adults. They all have beautiful fresh plumage!   Hope they like it here and will come back next year. But our awful polution really doesn't help...   Logged KK Hui BBS Member BBS God Bird Photography - at its best ...     Posts: 940 Re: White-fronted Goose « Reply #5 on: Nov 11th, 2004, 7:31pm » Quote Modify Thanks for the interesting info, Betty!   Just hope these youngsters will manage their way home when the time comes using this simple "vector navigation" method ...     And I thought bird migration never takes place with just one single bird when on the move anyway?!     KK Hui ARPS www.geocities.com/kkhui_001 Logged madsen122020 BBS Member BBS God I love bird watching and TPK!     Gender: Posts: 163 Re: White-fronted Goose « Reply #6 on: Nov 11th, 2004, 8:40pm » Quote Modify What is the chinese name of White-fronted Goose Logged 要比普通人付出更大的努力,更多的時間 Betty BBS Member BBS God I love bird watching!     Gender: Posts: 154 Re: White-fronted Goose « Reply #7 on: Nov 11th, 2004, 9:12pm » Quote Modify I also have the same question : Most birds migrate in flocks but how come we only see one or two birds of a certain species.   Could it be these youngsters not so strong & skillful in long distance flight that they are BLOWN off course ?   or they are a bit lag behind so cannot catch the flock ?   or we can apply Pippenho's theory   since different birds have their own character.       Logged Betty BBS Member BBS God I love bird watching!     Gender: Posts: 154 Re: White-fronted Goose « Reply #8 on: Nov 11th, 2004, 9:20pm » Quote Modify on Nov 11th, 2004, 8:40pm, madsen122020 wrote: What is the chinese name of White-fronted Goose 白額雁 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 »

香 港 觀 鳥 會
Hong Kong Bird Watching Society

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