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[Hong Kong] A New Bird Killer - Noise Barrier 新雀鳥殺手 - 隔音屏障

12/9/08
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12/09/2008 23:02

甚麼鶯?

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珠頸斑鳩

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元朗十八鄉路「鳥撞」報告
此報告是為紀錄元朗十八鄉路一帶的隔音屏障,懷疑造成雀鳥誤撞隔音屏障致死之報告。

元朗十八鄉路位於元朗市以南,於2006年完工,途徑之處是鄉村、花場或小型工廠。
此報告只涵蓋元朗十八鄉路之西段(由大棠路至元朗體育館路)(即圖中2至5段)及部份元朗體育館路(圖中1段)。

自2006年11月至2007年7月,主要紀錄在1至3段。
2007年7月至今,主要紀錄在4至5段。
紀錄時間主要通常在早上九時前,有時候於下午亦有一些紀錄。


雀鳥方面︰
調查範圍內所紀錄已死之雀鳥品種包括15種共31隻不同的留鳥及候鳥,被發現時皆倒在隔音屏障之前,並面向隔音屏障,有部份雀鳥屍體腐爛至無法辨識。亦有發現無表面傷痕的雀鳥(以柳鶯為主),停留在地面,反應遲鈍,直至幾分鐘後才能飛走。

各段的隔音屏障類型及「鳥撞」紀錄
段數        路政署編號        類型*        屏障數目        紀錄日期        所紀錄品種
1        NB146        A+        22        無法確定        2隻未能辨識的柳鶯
2        NB116        B        22        2006/12/31        白腰文鳥
                                2006/12/31        暗綠繡眼鳥
                                2007/1/8        暗綠繡眼鳥
                                2007/1/26        暗綠繡眼鳥
                                2007/5/13        白頭鵯
                                2007/5/14        黑臉噪(眉鳥)
                                2007/7/4        樹麻雀
                                2007/11/6        紅尾歌鴝
        NB117        B        5        2006/12/5        黃眉柳鶯
                                2007/2/6        白腰文鳥
3        NB118        B        8        2007/1/27        灰背鶇
                                2007/1/29        暗綠繡眼鳥
        NB135        A        8        2006/12/19        灰背鶇
                                2007/1/14        灰背鶇
                                2007/4/18        樹麻雀
        NB137        A+        15                 無紀錄
        NB138        B        17        2006/12/19        灰背鶇
                                2007/11/9        褐柳鶯
        NB139        B        25                 無紀錄
        NB139A        B+        22        2006/11/4        紅喉歌鴝(紅點頦)
                                2006/12/11        灰背鶇
                                2007/11/13        烏鶇
4        NB140        C        21                  無紀錄
        NB142        B        6        2008/8/10        暗綠繡眼鳥
                                2008/9/12        暗綠柳鶯(未確認)
                                2008/9/12        珠頸斑鳩
        NB141        C        18        2008/3/3        樹鷚
                                2008/6/15        樹麻雀
                                2008/6/26        樹麻雀
                                2008/8/1        暗綠繡眼鳥
                                2008/9/3        珠頸斑鳩
5        NB134#        B        24        2007/9/11        藍歌鴝
@無表面傷痕但反應遲鈍的紀錄。
# 於2008年4月貼上猛禽貼紙(見附圖)。

隔音屏障︰
元朗十八鄉路的隔音屏障以綠色透明屏障為主,主要建設在民居附近,在調查範圍內以一至兩層為主。隔音屏障十分透光且很容易能看到屏障後的景物,屏障背後往往是綠地或樹木,有時候有不少昆蟲在屏障上出沒。在清涼的早上或會有霧氣。


元朗十八鄉路上各種的隔音屏障
類型        層數         透明部份面積        圖片
A        1        165cm*270cm         
A+        石座+1        110cm*260cm         
B        2        (127cm*270cm)X2         
B+        2+斜板        (127cm*270cm)X2+80cm(斜板)         
C        石座+1        210cm *270cm         
於2008年4月第5段        NB134及元朗十八鄉路東段(大棠路以東)發現有關政府部門已貼上猛禽貼紙,但元朗十八鄉路西段(大棠路以西)並未實行有關措施。

由2006年11月開始的紀錄,可參見香港觀鳥會網頁︰
http://www.hkbws.org.hk/BBS/viewthread.php?tid=405

I have a pdf. version, but fail to upload here.

[ Last edited by HKBWS Surveyor at 9/10/2008 13:01 ]

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近幾天路政署已經於十八鄉路的隔音屏障貼上「猛禽貼紙」
希望這是個完滿的結局

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...i felt very sad & sorrowful indeed......

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I think we need to record this in history.  Can alan submit an article to the bulletin?

HF Cheung

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Mitigation. Highways Dept said the sticker option is the most effective.



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Quote:
Original posted by HFCheung at 14/01/2009 12:02
I think we need to record this in history.  Can alan submit an article to the bulletin?

HF Cheung
yes, do you mean the report that I wrote before?

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23/3/2009 白腰文鳥


=.=失望

[ Last edited by lalan at 24/03/2009 00:08 ]

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14/4/2009
Koei

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佢地死得好慘呀!
d 貼紙似乎唔係好有效喎!

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29/04/2009
Grey-streaked Flycatcher
斑胸鶲

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29/04/2009 22:43

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10/05/2009
樹麻雀

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2009/6/27
japanese white-eye
Scaly-breasted munia
2009/6/29
japanese white-eye
Red-whiskered bulbul

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3/7/2009
相思

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7/7/2009
相思

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Nothing we can do to save the birds?

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8/7/2009
長尾縫葉鶯

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28-07-2009
噪鵑
暗綠繡眼鳥

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Alan, can you show the location of dead birds? Any stickers on this part of noise barriers? Pls advise. Captain

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05-08-2009
普通翠鳥

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Quote:
Original posted by wcaptain at 30/07/2009 09:31
Alan, can you show the location of dead birds? Any stickers on this part of noise barriers? Pls advise. Captain
dear captain,
all birds in this post were found in the same site, and all noise barriers had stickers since aug-08
alan

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15/9/2009
普遍翠鳥

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有沒有留意到隔音屏障的座向與死鳥數目是否有關係?

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同座向的關係不大
但向荒野一邊的比較多

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會不會是因為屏障後的植物及貼紙太疏的原故呢?
那些雀鳥會不會是看見屏障後有植物,
然後就想在貼紙與貼紙間的空隙飛過去植物那兒,
結果就撞上了屏障呢?

[ Last edited by Sze at 17/09/2009 01:36 ]

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不一定
有些雀鳥是由荒野飛向馬路
相反的亦有

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23/9/09


冕柳鶯?

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25-09-2009
find a lanceolated warbler
矛紋斑鶯


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Thanks lalan.  Instead of updating us for any incident bird injuries caused by the glass, is there anything that I can do?  
Manson Tsang
雀鳥科

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如果遇到以上情況,
如非必要不要移動或干擾該雀鳥
因為牠只是暫時失去活動能力
只是給時間牠休息便可


之後記得影相及在這論壇留下該地點的位置等等資料

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Quote:
Original posted by lalan at 25/09/2009 23:53
如果遇到以上情況,
如非必要不要移動或干擾該雀鳥
因為牠只是暫時失去活動能力
只是給時間牠休息便可


之後記得影相及在這論壇留下該地點的位置等等資料 ...
隻雀後來你有沒有見牠飛走啊?

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Thanks again, lalan.

I think I haven't made myself clear.  From your report, I think there were still many bird tragedies.  Would anyone advise us what we can/may do for this issue?  Your photo records are already a relevent evidence to prove that the bird stickers are INEFFECITVE or not as effective as expected.
Manson Tsang
雀鳥科

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祈禱   
祈禱   
祈禱   
祈禱   
祈禱

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27-09-2009
冕柳鶯
eastern crowned warbler

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27/09/2009 22:23

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呢期似乎好密喎!隔日就有一單!

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As any experienced bird ringer will tell you, there are certain species which become active very early in the morning, often at the first hint of daylight, which if trapped are frequently among the earliest birds trapped on a given morning.  In Hong Kong notable examples are chats, thrushes and Lanceolated Warbler, and I'm saddened, but not surprised that these are well represented among the birds affected by the noise barriers.  The problem is that these birds move around in such low light levels that black bird stickers are probably effectively invisible at that time and will not resolve the problem.

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thank you paul for answer why the black bird stickers didnt work as we hope
most noise barrier are face on south and west, that may be the reason the birds can't saw it ever the sunrise
as I konw some of the noise barrier were using straight line to protect the birds, do you think it work?

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08/10/2009

what kind of warbler?

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I had got up before sunrise to check how's the light affect to the black bird label,
我在日出前起床,到場看看日出的光線會否影響那些黑鳥圖像,
it seem ok, can see the shadow too.
連影子都看得見。



but i saw a reed warbler on the flood,
according to my record the bird hit the board during 0616 to 0649, today sunrise at 0615
根據紀錄這隻大葦鶯應該是在0616至0649這段時間撞上屏障,今天的日出時間是0615

lucky it still can fly,
幸好牠還可以飛


u can imagine how it hit the board
你可以想像牠如何撞上屏障

luckly the dog dont interest in bird
幸好狗不好吃雀

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觀塘繞道麗港公園段最近也加裝了透明隔音屏,
上面貼滿了猛禽剪影。
繞道旁是麗港公園,下面是馬路,
不容易確定有沒有雀鳥中招。

The Kwun Tong Bypass running along Laguna Park is also fitted with noise barriers recently,
with silhouettes of raptors on the transparent panels.
The Bypass is next to a park, and a highway runs underneath.
It is not easy to monitor if birds are killed.

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Quote:
Original posted by BWA at 10/10/2009 15:36
觀塘繞道麗港公園段最近也加裝了透明隔音屏,
上面貼滿了猛禽剪影。
繞道旁是麗港公園,下面是馬路,
不容易確定有沒有雀鳥中招。

The Kwun Tong Bypass running along Laguna Park is also fitted with noise barriers r ...
對呀,香港確實很多隔音屏障
但很多都在不易觀察的位置,十八鄉路是一個特殊例子

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新的報告,只有中文版
http://www.sendspace.com/file/eq6c3k

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在facebook的群組︰
http://www.new.facebook.com/group.php?gid=177708551210&ref=nf

更正︰第6頁的暗綠柳鶯應為Greenish Warbler        Phylloscopus trochiloides

[ Last edited by lalan at 13/10/2009 18:35 ]

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alan! 辛苦你了!
另外,想問下你會是定期去check ,定係隨機去check的呢?
因為如果是定期的話, 可否整理一個類似 waterbird count既 chart ,
Y-軸為雀鳥的隻數, X-為年份及月份?
唔知鳥撞會唔會有季節性的高峰期呢?


[ Last edited by Sze at 13/10/2009 21:17 ]

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Those noise barrier should have a better design.  HKBWS should write to highway department.

HF Cheung

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經濟日報 14/10/2009

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Design of noise barriers to change in bid to save birds
SCMP 16-10-2009

Officials plan to modify glass panes on a Yuen Long road

Highways officials plan to modify the glass pane design of noise barriers on a Yuen Long road after at least 50 birds hit the barriers and died over the past three years.

The officials are working with conservation officers to devise a better design to frighten birds away from the barriers. Design and installation could be completed in a few months.

One option is to replace the black hawk silhouette stuck onto the glass panes since late last year with stickers of opaque stripes or colourful circles to minimise the transparent-glass surface.

The birds, mostly smaller species and some rarely sighted, have been found lying dead or semi-conscious at the bottom of the barrier, which was built along Shap Pat Heung Road in 2006 to cope with increasing traffic brought by property development in the area.

They had apparently collided with the three- to six-metre-tall transparent glass barriers, which stretch intermittently along the road for a few hundred metres to shield villages from traffic noise. In some sections, there are trees immediately behind the barriers.

Fifty-three birds from 25 species have fallen prey to the barriers so far, leaving 50 dead and three injured. The last collision happened about a week ago.

Alan Lam Ngo-lun, a dedicated birdwatcher who passes the noise barrier almost every day and has compiled a detailed list of the victims, said he suspected that the transparent glass barriers, which looked invisible to birds, were to blame.

"The actual death toll could be far higher than I have recorded, as some dead birds could have been removed by street cleaners before they were found," Lam said.

Smaller birds, as little as 11cm in length, were found to be particularly prone to hitting the barrier, as they usually flew closer to the ground. But bigger birds, as long as 40cm, were also found dead.

The most vulnerable species were resident birds that lived nearby, such as the Japanese white-eye, a common and tiny songbird species that accounted for one-fifth of the toll. About 10 per cent of the victims were Eurasian tree sparrows.

Rarely sighted migratory bird species including the Siberian blue robin were also on the death list.

Lam said it was difficult to explain why some birds hit the glass and what circumstances were more conducive to collision, because systematic research into the problem was lacking.

He said such collisions had also become more common in urban areas, with more and more buildings being covered with reflective glass panes that might distort birds' view of the world.

According to the National Audubon Society in the United States, there are about one billion bird deaths resulting from collisions with windows and buildings each year in the United States.

Jackie Yip Yin, a nature conservation officer from the Agriculture, Fisheries and Conservation Department, said it had asked the Highways Department to consider remedial measures, after reading Lam's report.

She said most birds could have hit the glass early in the morning or when visibility was reduced.

Highways Department chief engineer Tse Chun-tat said it was still studying the best options to minimise bird collisions, but replacing the transparent barriers with non-transparent ones might not be financially viable or welcomed by residents.

"We also have to consider the visual impact on the residents, as a non-transparent barrier might block their view, " he said. "This is a balance we have to strike."

He said it might take some time to design the new stickers, and the department would monitor their effectiveness before considering whether to extend the new techniques to other noise barriers.

DOCUMENT ID: 200910170270355

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之前的報告太多錯漏,作了更正。










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18/12/2009
pallas's leaf warbler
japanese white-eye

need to update the report again

[ Last edited by lalan at 18/12/2009 19:12 ]

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