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Subject: [Hong Kong] A New Bird Killer - Noise Barrier 新雀鳥殺手 - 隔音屏障 [Print This Page]

Author: lalan Time: 4/11/2006 23:03 Subject: A New Bird Killer - Noise Barrier 新雀鳥殺手 - 隔音屏障

A Ruby-throat dead 紅點頦死了

The noise barrier is a new trap 隔音屏障是新的陷阱

Author: cchristina Time: 4/11/2006 23:23

Hello, may I know the location?

Christina

Author: fforrest Time: 4/11/2006 23:24

Hi Alan,

Can you tell us the location of the noise barrier and date of the bird collision please. :cry:
Forrest

Author: lalan Time: 5/11/2006 22:18

11月4日
元朗十八鄉路與公庵路交界以西

我們可以做甚麼呢？

Author: lalan Time: 1/12/2006 11:31

1/12/2006
土瓜灣馬頭圍道帝庭豪園
也是隔音屏障
死者︰珠頸斑鳩

Author: wcaptain Time: 1/12/2006 14:13

If you feel comfortable, pls send a fax reporting the no and spp of dead birds, date, and location to Highways Department and cc it to EPD.

They will do something to stop this happening again.

If it is not too convenient, pls send these information to Kadoorie Farm and Botanic Garden (Attn: Captain Wong) at 2483 1877 (fax) or captainw@kfbg. or g

These information will be sent to the relevant depts for drawing their attention.

Your kind help will certainly reduce possible bird collision in the future.

Captain Wong
Kadoorie Farm and Botanic Garden

Author: lalan Time: 5/12/2006 13:58

又係十八鄉路的體育路新段
5/12/2006(今日)發現黃眉柳鶯屍體
我經過的位置只是整段隔音屏障的一部份，其他位置可能有更多...... :evil:

Author: lalan Time: 11/12/2006 11:33

:evil:
又係十八鄉路的體育路新段
11/12/2006灰背鶇
真係日日新鮮

附圖是元朗新建的十八鄉路(部份)
紅線是隔音屏障的位置(部份)
自十一月起已經發現至少三隻雀鳥誤撞屏障而死

Point1 是紅點頦
Point2 是黃眉柳鶯
Point3 是灰背鶇

整段十八鄉路貫穿了不少鄉郊地方，屏障兩邊都是空曠的鄉村，我途經的地方只是整段的一小段，而且只是在上下班的時間，究竟整段路每天會害死多少雀鳥呢？還有全香港有多少這樣的隔音屏障呢？

Image Attachment: deadwall.JPG (11/12/2006 11:33, 0 Bytes) / Download count 12408
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Author: lalan Time: 19/12/2006 22:24

Point 4 灰背鶇(雄)19/12/2006

Point 5 灰背鶇(雌)19/12/2006

Image Attachment: .JPG (19/12/2006 22:24, 0 Bytes) / Download count 12263
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Author: lmichael Time: 20/12/2006 09:29

I cannot read the Chinese but this looks like a classic case of how NOT to design a noise barrier - clear glass and extensive green area on one side so that disturbed or frightened birds instinctively try to dive in to cover.

This should definately be reported to Government so that remedial measures can be taken - ideally making it opaque or failing this applying conspicous shapes to the glass to make it more visible.

Mike Leven

Author: lbarry Time: 21/12/2006 12:37 Subject: Re: Noise Barrier

Sorry to note so many fatal cases regarding birds hitting on the noise barrier. I think the design of noise barrier should be changed. A raptor figure with an illuminating material should be adhered on the surface of noise barrier so that birds will not fly too close to it. The designer of HyD should take note in order to prevent from recurrence. However, I always feel that the engineers working in the government are very robust. They are not so considerate. Development is at their first priority while sustainability of culture, building, environment, social lives is put aside. They can destroy Star Pier, Queen Pier and can sacrifice natural animals and plants.
What a cruel government !

Author: lalan Time: 31/12/2006 22:23

2more birds had been found
2006年12月31日 white-rumped minia 白腰文鳥
2006年12月31日 japanese white-eye 暗綠繡眼鳥 x2

Author: 深藍-Owen Time: 31/12/2006 22:31

早陣子新聞見路政處宣傳呢類隔音屏效果. 而且決定未來會加設更多這類透明隔音屏. 同時指出這類隔音屏做成鳥類死亡的事件只是很小數.

Author: Webcreeper Time: 31/12/2006 23:20

Government Press Release on 24/12/06

Green noise barriers to go on trial

Plants can soften the appearance of noise barriers and improve the streetscape, Highways Department Chief Engineer Chow Chun-wah says. Special panels will be put on trial on two road sections in Kwun Tong and Tsuen Wan where noise-barrier retrofitting will begin in 2007.

Noise barriers and enclosures are often installed to protect residents from traffic noise. While they mitigate noise, they also have a visual impact. In this regard, a study was launched early this year to explore the greening and aesthetic design of noise barriers.

To alert our feathered friends, falcon stickers (right) have been put on the transparent noise barrier along Kam Tin Bypass to make the panel visible to birds.

... ...

On other greening measures, such as concrete panels with climbers, the engineering expert said the public prefer transparent panels since concrete ones may block views and light.

Apart from the acoustic, aesthetic and greening aspects, engineers must also take into account the safety of our feathered friends, especially when designing noise barriers in areas with high bird density or in rural areas.

... ...

Barriers made visible

"With the advice of the Agriculture, Fisheries & Conservation Department, we have put falcon stickers on a section of transparent noise barriers along Kam Tin Bypass since June, to make the barriers visible to birds, following reports that bird carcasses were found," Mr Chow said.

Local and overseas experiences have shown that falcon stickers can cut the number of birds who fly blindly into the transparent barriers. The AFCD's initial assessment found the trial on Kam Tin Bypass worked well, with only one dead bird found in the two-month observation period.

In the same period, 20 bird carcasses were found along the section where no falcon stickers were posted.

To confirm the stickers' effectiveness, falcon stickers will be put on another section of transparent noise barrier along Kam Tin Bypass in early 2007.

Mr Chow noted so far there are no dead-bird reports for other roads fitted with transparent noise barriers.

Author: Webcreeper Time: 31/12/2006 23:25

24/12/06 政府新聞稿

兩路段引入綠化隔音牆

路政署的研究發現，以透明物料建造隔音屏障，可減低侷促的感覺，但若情況許可，可考慮加添綠化元素，如採用綠化隔音牆、附以攀爬植物的混凝土隔音屏障、土堤，以及綠化隔音罩頂部。

將軍澳道近翠屏南邨和青荃橋荃灣段引道，將試行引入綠化隔音牆，預計2009 - 10年完成。

為提高雀鳥的警覺，錦田繞道的透明隔音屏障已貼上猛禽的圖案。

錦田繞道的1段透明隔音屏障則已貼上猛禽圖案（右圖），提高雀鳥的警覺。

... 加上區議會和居民的意見大多傾向採用透明的隔音屏障，故較多採用透明的隔音屏障。

... ...

隔音屏障的設計，除了能發揮屏障的功能，以及具美化和綠化的效果，若裝設的地點位處鄉郊，或是雀鳥經常途經或聚集，設計便也要顧及保護生態的元素。

   周進華表示，在收到意見指出，在錦田繞道近高埔村的透明隔音屏障附近發現雀鳥屍體後，便根據漁農自然護理署的建議，6月在1段透明隔音屏障貼上獵鷹圖案，以測試這能否減低雀鳥撞向透明隔音屏障的成效。

猛禽圖案試驗理想

   根據本地和海外的經驗，猛禽圖案能令其他雀鳥更為警覺，並察覺到透明隔音屏障的存在，以減低雀鳥撞向透明隔音屏障的機會。

   漁護署的初步評估認為，試驗的效果理想。在兩個月的試驗觀察期內，貼上獵鷹圖案的屏障下，只錄得1隻死雀，較同一地段沒貼有獵鷹圖案的屏障下錄得的20隻死雀數目明顯為低。

   路政署明年年初在上址另一段透明隔音屏障貼上獵鷹圖案，以便漁護署進一步研究這些圖案的成效。

周進華指出，除錦田繞道外，暫時未收到報告指其他路段的透明隔音屏障下發現死鳥。

   然而，若有迹象顯示透明隔音屏障對雀鳥構成危險，漁護署和路政署將研究是否需要貼上獵鷹圖案及其可行性。

   路政署已有作業指引，要求工程師在設計階段，考慮預防雀鳥撞向透明隔音屏障的設計。有關作業指引的詳情，可瀏覽這裡。

Author: Webcreeper Time: 31/12/2006 23:38

Link given in the Chinese version of the press release.

PRACTICE NOTES NO. BSTR/PN/003 - Revision B
Noise Barriers with Transparent Panels
Bridges and Structures Division October 2006

3. Design Considerations

Apart from the noise mitigation requirement for the noise barrier, the designer shall also consider, inter alia, :-
(i) Cost effectiveness
(ii) Safety and fire resistance
(iii) Aesthetics
... ...
(ix) Bird collision
... ...

3.9 Bird collision

There are reported cases where birds collide onto the transparent noise barrier panels causing bird mortality. As the panels are either transparent which appears invisible to birds or reflective that mirrors the facing landscape, birds are unable to recognize them as physical barriers. Having considered the bird collision problem, the Director of Agriculture, Fisheries and Conservation (DAFC) recommended that transparent materials should be avoided as far as possible in the design of noise barrier in areas with high bird density or for roads that cut across rural areas.

To address the bird collision problem, designers should consider bird collision measures during the design stage. It has been a standard practice in Hong Kong to provide transparent noise barrier panels with either tinted materials, embedded opaque stripes or superimposed patterns of thin opaque stripes. However, recent experience suggested that application of tinted materials alone may not be adequate in preventing bird collision and further mitigation measures are needed. In this regard, our department and DAFC are investigating several alternative measures to address the problem. Designers may take note of the investigation and seek DAFC’s advice where necessary.

Author: lalan Time: 1/01/2007 22:13

[quote:f47c922c36="Webcreeper"]24/12/06 政府新聞稿

周進華指出，除錦田繞道外，暫時未收到報告指其他路段的透明隔音屏障下發現死鳥。
[/quote]

what the hell????????

Author: lalan Time: 8/01/2007 22:21

2007年1月8日 japanese white-eye 暗綠繡眼鳥 :x

Author: lalan Time: 16/01/2007 13:14

14-01-2007 Grey-backed Thrush(F) 灰背鶇(雌)

Author: lalan Time: 26/01/2007 09:59

26-01-2007
japanese white-eye 暗綠繡眼鳥 X 2
Seem the gov didnt want to do anything.

Author: lalan Time: 28/01/2007 00:06

27-01-2007Grey-backed Thrush(F) 灰背鶇(雌)

Author: lalan Time: 29/01/2007 13:23

29-01-2007
japanese white-eye 暗綠繡眼鳥 X 2

it is any related to the low temp.?

Author: lalan Time: 6/02/2007 16:24

2007年2月6日 white-rumped minia 白腰文鳥

Author: lalan Time: 20/04/2007 11:20

2007-4-18
樹麻雀

Author: lalan Time: 14/05/2007 09:30

13-5-2007白頭鵯
14-5-2007黑臉躁(眉鳥)

Author: lalan Time: 5/07/2007 12:34

2007-7-4
樹麻雀

Author: lalan Time: 11/09/2007 13:55

2007-9-11
不知道是甚麼雀，是亞成的

Image Attachment: IMG_8127.JPG (11/09/2007 13:55, 0 Bytes) / Download count 6549
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Author: cgeoff Time: 11/09/2007 14:06

This is a 1st winter male Siberian Blue Robin. There are usually only 2-3 records of this species each year.

Where was it found?

Geoff

Author: lalan Time: 11/09/2007 21:56

on the same road,next to the hangheung workshop.
should i be happy with this new record ??:roll:

Author: cgeoff Time: 12/09/2007 12:12

It's an interesting record. Pls make sure you submit it to the Society at the end of the year. The Excel file for record submission is elsewhere on this website.

Thanks,

Geoff

Author: laustin Time: 13/09/2007 21:54

T T T_T T^T T'^'T :cry: :cry:

Author: lalan Time: 30/10/2007 22:56

30-10-2007
褐柳鶯

Author: lalan Time: 6/11/2007 21:51

6/11/2007
紅尾歌鴝
rufous-tailed robin

幾時先會停？
when it stop?

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Author: lalan Time: 9/11/2007 23:36

Dusky warbler
褐柳鶯

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Author: lalan Time: 13/11/2007 12:56

13/11/2007烏鶇Common blackbird

Author: lalan Time: 3/03/2008 23:24

3/3/2008
Olive-backed Pitpit

Image Attachment: IMG_9720 (Small).JPG (3/03/2008 23:24, 0 Bytes) / Download count 2478
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Author: lalan Time: 14/04/2008 00:26

政府終於在十八鄉路的隔音屏障加上這些猛禽貼紙了！
期望真的有效。
在此多謝觀鳥會各人的努力。
但這裡只是問題的冰山一角吧！

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Author: wcaptain Time: 14/04/2008 09:34

Hi Alan,

Thanks for your postings.

FYI. THey put these stickers on the Deep Bay Link in 2007. As far as we know, it is a policy to mitigate the bird collision problem in the new noise barriers.

However, for the old ones, they react very slow.....fortunately, they have done something.

Cheers,

Captain

Author: lalan Time: 22/04/2008 23:21

22/4/2008
樹麻雀

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Author: yyattung Time: 22/04/2008 23:27

I can see the reflection of the barrier! That cause the birds colliding it.

Author: lalan Time: 1/05/2008 23:15

Eyebrowed thrush 白眉鶇

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Author: lalan Time: 2/08/2008 23:06

1/8/08
相思
看來問題未解決

Author: lchunfai Time: 2/08/2008 23:13

Quote:

Original posted by lalan at 2/08/2008 23:06
1/8/08
相思
看來問題未解決

這麼久,一定要透明麼

難道美觀比生命重要?
再不改便去信報館,揭發事情

Author: lalan Time: 11/08/2008 13:49

10/8/08
相思

Author: lchunfai Time: 11/08/2008 17:45

又有

Author: HFCheung Time: 12/08/2008 16:08

I have asked George to look into the problem, to come up with some action on this. If you have any information, please post it on, or talk to George.

HF Cheung

Author: lalan Time: 14/08/2008 22:04

8月14日
紅耳鵯

和次前幾隻於差不多位置發現
難道和該處的榕樹果有關？？

Author: kmatthew Time: 16/08/2008 13:12

They should use more brightly coloured tapes, instead of those fake falcons which are black and hard to see against backgrounds.

Author: lchunfai Time: 16/08/2008 14:11

Quote:

Original posted by kmatthew at 16/08/2008 13:12
They should use more brightly coloured tapes, instead of those fake falcons which are black and hard to see against backgrounds.

I shouldn't be transparent

Author: lalan Time: 4/09/2008 22:25

4/9/2008
珠頸斑鳩

Author: lalan Time: 12/09/2008 23:02

12/9/08
more...

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Author: lalan Time: 4/10/2008 23:54

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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http://hkbws.org.hk/BBS/attachment.php?aid=2253

Author: lalan Time: 30/10/2008 23:53

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

Author: ph1115_ko Time: 13/01/2009 12:24

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

Author: HFCheung Time: 14/01/2009 12:02

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

HF Cheung

Author: wcaptain Time: 14/01/2009 12:26

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

Author: lalan Time: 14/02/2009 21:53

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?

Author: lalan Time: 24/03/2009 00:04

23/3/2009 白腰文鳥

=.=失望

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

Author: lalan Time: 14/04/2009 22:41

14/4/2009
Koei

Author: Sze Time: 17/04/2009 00:45

佢地死得好慘呀!
d 貼紙似乎唔係好有效喎!

Author: lalan Time: 29/04/2009 22:43

29/04/2009
Grey-streaked Flycatcher
斑胸鶲

Image Attachment: IMG_6116 (Small).JPG (29/04/2009 22:43, 36.41 KB) / Download count 994
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Author: lalan Time: 11/05/2009 15:33

10/05/2009
樹麻雀

Author: lalan Time: 29/06/2009 23:00

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

Author: lalan Time: 4/07/2009 00:23

3/7/2009
相思

Author: lalan Time: 7/07/2009 22:30

7/7/2009
相思

Author: Sze Time: 8/07/2009 21:51

Nothing we can do to save the birds?

Author: lalan Time: 8/07/2009 23:39

8/7/2009
長尾縫葉鶯

Author: lalan Time: 29/07/2009 23:58

28-07-2009
噪鵑
暗綠繡眼鳥

Author: wcaptain Time: 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

Author: lalan Time: 5/08/2009 22:58

05-08-2009
普通翠鳥

Author: lalan Time: 5/08/2009 23:00

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

Author: lalan Time: 15/09/2009 21:41

15/9/2009
普遍翠鳥

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Author: yyattung Time: 16/09/2009 09:02

有沒有留意到隔音屏障的座向與死鳥數目是否有關係?

Author: lalan Time: 16/09/2009 22:58

同座向的關係不大
但向荒野一邊的比較多

Author: Sze Time: 17/09/2009 00:58

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 ]

Author: lalan Time: 18/09/2009 00:37

不一定
有些雀鳥是由荒野飛向馬路
相反的亦有

Author: lalan Time: 23/09/2009 23:21

23/9/09

冕柳鶯?

Author: lalan Time: 25/09/2009 22:19

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

Author: thinfor Time: 25/09/2009 22:48

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

Author: lalan Time: 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

Author: Sze Time: 26/09/2009 01:19

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?

Author: thinfor Time: 26/09/2009 18:04

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.

Author: lalan Time: 26/09/2009 22:49

祈禱
祈禱
祈禱
祈禱
祈禱

Author: lalan Time: 27/09/2009 22:23

27-09-2009
冕柳鶯
eastern crowned warbler

Image Attachment: IMG_6875 (Small).JPG (27/09/2009 22:23, 101.16 KB) / Download count 926
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Author: Sze Time: 28/09/2009 00:40

呢期似乎好密喎！隔日就有一單！

Author: lpaul Time: 30/09/2009 14:41

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.

Author: lalan Time: 30/09/2009 23:32

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?

Author: lalan Time: 9/10/2009 20:43

08/10/2009

what kind of warbler?

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Author: lalan Time: 9/10/2009 21:02

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

Author: BWA Time: 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 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.

Author: lalan Time: 10/10/2009 22:29

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

Author: lalan Time: 12/10/2009 12:58

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

Author: lalan Time: 13/10/2009 14:29

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 ]

Author: Sze Time: 13/10/2009 21:16

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 ]

Author: HFCheung Time: 14/10/2009 16:56

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

HF Cheung

Author: lalan Time: 14/10/2009 23:53

經濟日報 14/10/2009

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Author: lalan Time: 19/10/2009 22:50

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

Author: lalan Time: 20/10/2009 23:12

之前的報告太多錯漏，作了更正。

Author: lalan Time: 18/12/2009 19:11

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 ]

Author: Sze Time: 24/01/2010 20:53

Today ATV News!

http://www.hkatvnews.com/v3/share_out/_content/2010/01/24/atvnews_136908.html

Welcome to HKBWS Forum 香港觀鳥會討論區 (http://hkbws.org.hk/BBS/)