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5 March 2006 at 11:47 am #4036
The magpie proved H5N1 positive; so too two house crows:Quote:The Agriculture, Fisheries and Conservation Department (AFCD) said today (February 27) that three earlier suspected cases were confirmed to be H5N1 positive after a series of laboratory tests.
The cases involve a dead House Crow collected on Lai On Estate on February 20, a dead House Crow collected on Tai Hang Tung Estate on February 23, and a dead Common Magpie collected on Island Road on February 24.
Bit of a lull in cases right now.
Seems we’ve had virus in poultry/songbirds (all songbird species that may have been from captivity), then crows/magpies.
Possibly, then, moving from introductions through markets, to dying out in wild bar some scavengers – and these not in major numbers.8 March 2006 at 9:46 am #4037
Just seen that HK Agriculture, Fisheries and Conservation Department now has pdf file for download, with H5N1 infections in birds this year. Useful; as well as species and dates, includes a map. Indeed shows broad pattern (tho v small data sample for being conclusive re pattern), with some infections New Territories, shift to Kowloon and HK Island. Also, indeed in "wlld" birds trend from songbirds (maybe inc captives?) towards corvids.
After magpie robin on 10 Jan, mainly from 26 January – just before Chinese New Year, with the Year of the Dog beginning on 29 January. No submissions since 25 Feb.25 March 2006 at 8:29 pm #4038
A peregrine found in Tin Shui Wai, northwest Hong Kong (a new town) on 21 March has tested positive for H5N1.
It was an injured bird, reported by member of the public; died the next day.
More than 6,000 dead birds have been tested for H5N1 avian influenza since late October, 2005, with 16 confirmed cases involving two chickens and 14 wild birds.
– note that “native” birds would be more accurate, since not known if wild or captive origin for all the birds.7 January 2007 at 4:50 am #4039
Press release from HK Govt:Quote:The scaly-breasted munia found dead in Causeway Bay earlier this week was confirmed to be H5N1 positive after a series of laboratory tests, the Agriculture, Fisheries & Conservation Department says.
The carcass was collected by AFCD staff in Leighton Road following a public referral on December 31.
The department reminded people to observe good personal hygiene, adding they should avoid personal contact with wild birds and live poultry and clean their hands thoroughly after coming into contact with them.
Meanwhile, the department has urged the public not to release pet birds as they have little chance of surviving in the wild.
Noting a report alleging that there is no control on such imports from the Mainland was incorrect, the department emphasised that all consignments from the Mainland must comply with requirements including health certification, and they are subject to inspection whether they enter by sea, air or land in accordance with Public Health (Animals & Birds) Regulations.
Inspection stepped up
The department has stepped up inspection of the Bird Garden from three times a week to five. Samples are regularly collected for testing for avian influenza viruses.
Of the 2,400 samples that were tested last year, none was positive for bird flu.
Fresh droppings from wild birds including migratory birds are also collected for H5 avian influenza testing. Last year, 6,400 samples were collected and the results were all negative.
As for dead birds collected for testing last year, 17 of about 10,000 birds were tested positive.
– as with records of dead birds with H5N1 early last year, an oddity.
Leighton Road’s a curious location for finding a “wild” bird of almost any kind – might get sparrows, but I’ve walked along quite often, and not noticed any birds there: it’s urban, and more than a stone’s throw from even Victoria Park.
Species odd too: I haven’t seen this species in urban HK, not even in parks. Mainly in rural spots, esp grassy areas such as former rice fields, wetlands near Deep Bay. Have seen on Cheung Chau, where I live; only occasional there, so some evidence of wandering.
Checking HK Birdwatchin Soc page, this is one of the two most commonly released specise at temples – released so people can supposedly get karma boost.
More info in thread on the HKBWS site – including distribution map, showing this species wasn’t mapped in urban areas including Causeway Bay, as well as article from S China Morning Post on possible link to bird releases, including:Quote:Richard Corlett, professor of ecology and biodiversity at the University of Hong Kong, said a complete ban on releasing birds was preferable.
“It is a danger to public health because the sellers and buyers come into contact with birds and bird droppings with none of the precautions that are taken with poultry, and the birds are then released into the environment,” he said.
A study by a post-doctoral student last year estimated that between 500,000 and a million birds are imported for release every year, Professor Corlett said.
“[These birds] are mostly caught in China. They are not vaccinated, quarantined or inspected, and they were transported into Hong Kong in appallingly dirty and crowded conditions. Many of them are sick and injured,” he said.
Further info – after an email request for guff on the location:
A map of Causeway Bay – not too great – shows Leighton Road:
Yes, it’s near stops on the main tram route from Harcourt Garden/Central east to North Point and beyond. Also close to a major MTR station. Causeway Bay’s a bustling area, especially for shopping.
Main HK bird market isn’t here, but in Kowloon. There are, though, a few bird shops scattered around – can’t remember if in Causeway Bay area, but plausible in side streets.
There’s a Tin Hau temple a few hundred metres to the east. Can’t recall other temples, but there are plenty of temples scattered around HK.
I noticed re the h5n1 positive munia being among five dead birds (all munias?) picked up on Leighton Road. To me, indeed suggestive of being dropped from van, say.
The road is lined by commercial buildings, maybe with a few apartment blocks (pricier; not the kinds of places I’d expect to be transient points for birds).
Last year’s minor flurry of h5n1 in “wild birds” involved several rather similar cases – chiefly urban, at least one only a block or two away from main bird market, another very close to a major temple.
I then figured that any traders with birds dying of what may be H5N1 would try to dispose of them without officials knowing.
Meanwhile – touch wood – our key reserve for wild birds is yet to record a single case, despite extensive testing. (I’m of course hoping it stays this way; hope that no h5n1 somehow introduced from farms/markets – densely packed waterbird flocks could be impacted.)
Post edited by: Martin, at: 2007/01/10 16:1714 January 2007 at 10:16 am #4040
From Associated Press/Canadian Press article:Quote:HONG KONG (AP) – Something was strange about the little brown bird found dead from bird flu in one of Hong Kong’s busiest shopping districts. The scaly breasted munia usually lives in rural areas of the territory. So how did it and five others come to be in a bustling urban district – raising the threat of exposing residents and tourists to the virus? Experts think the birds may have been used in a Buddhist ritual that frees hundreds of birds to improve karma. So, with worries rising in Asia about a new outbreak of bird flu, officials are urging the religious practice be stopped to protect public health. ,,, The scaly breasted munia is native to Hong Kong but is usually found in tussocks in rural areas, said Lew Young, a manager at the Chinese territory’s Mai Po bird sanctuary. "Six scaly breasted munia being found dead at the same spot at one time easily leads one to suspect whether they were being released," he said. The birds are commonly used in the Buddhist ceremonies, Young added. "They are usually transported to Hong Kong from the mainland in boxes. If one of the birds is sick, the rest are likely to be sick as well since they are crammed in one box," he said. Aidia Chan, a postgraduate student in ecology who studied the releases for her thesis last year at Hong Kong University, said the frequency of releasing birds in Hong Kong is far more than had been suspected. She contacted 229 religious groups in the city and 48 admitted they released birds to seek blessings. The groups practise the ritual one to 18 times each year, releasing as many as 3,000 birds each time, she said. "Based on the figures they gave me, I estimate they released a range of 400,000 to 600,000 birds in 2006," Chan said. "There are also people who buy and release birds individually and there’s no way for me to quantify them, so there should be more other than these 48 groups," she said. …
Hong Kong Buddhists release birds in ritual, despite bird flu worries14 January 2007 at 10:26 am #4041
from HK Govt press release, 13 Jan:Quote:Preliminary testing of a dead bird found in Shek Kip Mei has indicated a suspected case of H5 avian influenza, a spokesman for the Agriculture, Fisheries and Conservation Department said today (January 13).
Further confirmatory tests are still being conducted.
The carcass of the Crested Goshawk was collected by department staff at the hill behind Shek Kip Mei Health Centre on January 9 after being alerted by a member of the public.
Crested Goshawk is a raptor, preying on birds – chiefly songbirds.
Shek Kip Mei is highly urban, chiefly residential area in north Kowloon, with high-rise housing estates. Near the scrubby hillsides of hills just north of Kowloon, so wild Crested Goshawk may well occur here. (Though hope it’s checked for signs it was held in captivity, and dumped – as with at least one HK peregrine with H5N1).
My view: if proves to have H5N1, likely caught through a bird it ate. Can speculate that this was a bird released from captivity. (Or, if the goshawk wsa captive, fed on diseased chicken or some other bird.)
Post edited by: Martin, at: 2007/01/14 02:3616 January 2007 at 11:34 pm #4042
Reuters now with piece on Buddhists releasing birds in Hong Kong, inc:Quote:Six scaly-breasted munias — a popular species of “prayer birds” used for release in Buddhist rituals to enhance a devotee’s karma — were found dead in a busy shopping on New Year’s eve, including one which tested positive for the H5N1 virus.
“We really have to seriously consider this possibility of (prayer bird) infection,” said Malik Peiris, a virologist and leading bird flu expert at the University of Hong Kong.
“In Hong Kong, there is no H5N1 activity in poultry. So for this bird that was found dead, the question is how (it) got infected?”
Prayer bird species range from munias, Japanese white-eye, white-rumped munia and tree sparrows costing as little as HK$4 (US$0.50) each, to the more expensive azure-winged magpies and Mongolian larks. Hunters in China use large fine “mist” nets that the birds fly into.
While the Hong Kong government tightly regulates poultry imports, laws for wild bird imports are much more lax, making it a potential crack in the city’s bird flu defences.
Richard Corlett, a professor of ecology at the University of Hong Kong, said the trade in wild birds was on a much larger scale than previously thought, with at least half a million birds freed by Buddhists in 2005, sometimes thousands at a time.
“Mongolian larks, for instance, must have been caught in northern China, trucked down to Hong Kong then released here in a totally unsuitable environment, where they promptly die.”
Mass bird release sites in quiet corners of Hong Kong’s country parks are often littered with discarded empty bamboo cages and dead bird carcasses, Corlett added.
Hong Kong’s concerns come as the European Union passed new laws last week banning imports of wild birds on health and animal welfare grounds, a move which Corlett said the Hong Kong government should follow.
“There’s a great deal of reluctance to acknowledge this is a problem … You can go and buy 10,000 budgerigars and release them in a country park and there’s nothing to stop you doing that,” Corlett said.
Some experts see unregulated imports of wild birds as a serious bird flu risk. “This speculation or hypothesis is becoming more and more of a concern. There is more evidence to support this,” said Dr. Lo Wing-lok an infectious diseases expert and former legislator.
HK experts cite “prayer bird” concerns over H5N1
The (Hong Kong) Standard has a related item, inc:Quote:A microbiologist has called on the government to step up surveillance on the illegal trade of smuggled birds while an ecologist has suggested a complete ban on the release of wild birds in the SAR, even on religious grounds.
“The SAR government should deal with the problem at source and work with the Guangdong authorities to test the birds,” microbiologist Lo Wing-lok said Monday.
Lo, who accused the government for trying to evade the problem, insists more can be done to monitor the illegal trade of smuggled wild birds from the mainland.
Hong Kong University ecologist Richard Corlett said the goshawk is a predator and the dead one found in Shek Kip Me was most likely released in a religious ceremony [or ate a released bird??].
“Although we cannot know what bird it ate, we do know that the birds released by Buddhists are often in terrible condition because of the cruel way in which they are treated during capture, transport from the mainland and in captivity in Hong Kong, and this makes them very vulnerable to predators like a goshawk,” Corlett said.
He added that the more than half a million birds released in Hong Kong each year probably are eaten by predators shortly after being set free.
Corlett suggested a ban on the release of birds on grounds of animal cruelty since almost half a million are captured each year and transported to Hong Kong in atrocious conditions.
Post edited by: Martin, at: 2007/01/16 16:1120 January 2007 at 11:21 am #4043
After news re Japanese White-eye and House Crow found dead, and with H5, in Kowloon, posted this to group re H5N1 and wild birds:
Yes, fitting pattern of last year I’m afraid. Both the white-eye and the house crow in urban Kowloon; house crow now a common resident in some parts of Kowloon (yet I’ve never seen one in HK! – rarely to the estates etc of Kln).
Last night, reporter at S China Morning Post emailed me shot of dead Red-whiskered Bulbul, requesting identification.
Today, on radio, heard mention re White-rumped Munia also found in Kowloon – Boundary Street. Near Mong Kok Bird Market, which being disinfected/checked, and where, reportedly, sales have halved in last few days (oh dear, how I sob…).
Haven’t seen re whether birds being checked for possibility of captive origin.
This email has been circulated in HK by an ecology prof:Quote:Dear All,
I am talking to the Centre for Health Protection’s Scientific
Committee on Emerging and Zoonotic Diseases next Wednesday about
religious bird release. My main message will be that the half-million
or more birds imported and released every year are the most likely
origin of the urban H5N1 outbreaks in January-March 2006 and in 2007.
The species involved are either ones released in large numbers or
species that would predate or scavenge dead or dying birds. If anyone
thinks “most likely” is too strong, please could you provide more
likely alternatives within the next few days!
Talking to reporters over the last couple of days, I have the
impression that – while we all agree that importing huge numbers of
birds under dreadful conditions to release into unfamiliar
environments is a bad thing – we are giving out mixed messages on
what ought to be done about it. I would like to suggest that we all
agree on the EU’s solution, i.e. a permanent ban on the import of
wild-caught birds, with all captive-bred birds required to be fitted
with unique, traceable closed rings or microchips. If this was done
after consultation, and with perhaps a 1-year grace period, it should
cause nobody any hardship. Hong Kong can do without HK$4 birds.
It would only impact the high-volume low-profit-margin end of the
bird trade, since many of the most popular cage-birds are already
captive-bred and the parrots, at least, have numbered rings. The
massive improvement in bird welfare should please the Buddhists and –
I hope – they would have second thoughts about releasing more
expensive birds of obvious captive origin. I cannot see Beijing
or Guangzhou objecting, since much of the current trade is illegal
or barely legal under a variety of local and national laws.
Would WWF, TRAFFIC, HKBWS and/or KFBG be interested in drafting a
formal proposal on this that we could then all sign?
Feel free to pass this around, but please don’t reply to everybody
unselectively since it just clogs people’s mailboxes.
Department of Ecology & Biodiversity
The University of Hong Kong
Pokfulam Road31 January 2007 at 9:44 pm #4044
News recently in of dead peregrine with H5N1; also found in urban area – Tsuen Wan, by northwest Kowloon. (Was it captive, I wonder.)
Just asked to comment on article in S China Morning Post today, which began:Quote:Mai Po Nature Reserve in the northwestern New Territories provides a “natural” early warning system for bird flu in Hong Kong, according to a visiting bird flu expert.
Dirk Pfeiffer, professor of veterinary epidemiology at the University of London’s Royal Veterinary College, said the number of dead birds with H5N1 found this month was insignificant compared with the number of carcasses collected for testing and should not cause alarm.
Up to yesterday, only seven out of 1,600 birds collected had been found with H5N1 flu. This compared with January last year when 470 dead birds were collected, four of which tested positive.
For the whole of last year, 17 out of 10,000 birds collected had H5N1.
Although any “trigger point” marking the explosion of bird flu would be difficult to anticipate, Dr Pfeiffer said “to be quite frank, you would see an excess mortality in Mai Po before that actually occurs”. “Before you see large percentages in resident wild birds you would actually see something in Mai Po,” he said.
“You actually have a nice warning system there.”
Even if wild birds at Mai Po became infected, it would be “a long way” before this would spread from poultry to humans, and then among humans.
it concluded:Quote:Meanwhile, television and radio announcements will be broadcast from next week advising people not to release birds into the wild, whether for Buddhist merit-making ceremonies or any other cultural or religious reason.
“We have talked to Buddhist and Taoist associations and they agreed not to release birds,” said Thomas Sit Hon-chung, assistant director of the Agriculture, Fisheries and Conservation Department.
He said it would be useless to ban the practice because Hong Kong was a big area.
I saw that remark re Mai Po, and was rather surprised.
Seemed to me that made by an “expert” who had parachuted in, and had little knowledge re wild birds and H5N1.
Not sure why he didn’t stress that, despite extensive testing, not one bird from Mai Po has yet proven H5N1 positive.
This is strong evidence that waterbirds – the main reservoir for natural bird flus – do not sustain and spread H5N1 (chiefly as “dead ducks don’t fly”; HK yet to find H5N1 in an apparently healthy wild bird of any kind).
He might also have noted that the species and pattern involved in H5N1 in dead wild birds in HK this year does not fit what you’d expect were migratory – or even resident – wild birds the source. Four songbirds, plus two birds of prey and a crow – all species that are resident in Hong Kong; the songbirds all commonly released in rituals, the birds of prey mainly bird eaters (and I haven’t seen whether were signs either or both may have been captive birds that were dumped, as evidently case with one or two peregrines that tested positive here in the past), the crow a general feeder including scavenger.
So, Mai Po would be early warning system were H5N1 actually spread by wild birds.
But as this isn’t the case, it’s the wrong place to look. Worldwide, too much attention has been diverted to looking at wild birds, rather than better scrutinising poultry trade, legal and – very importantly – illegal.
Spread isn’t from wild birds to poultry and on to humans.
It’s from poultry to poultry, poultry to wild birds, poultry to humans, poultry to cats, poultry to even tigers (Thai zoo).
(Do I think there’s conspiracy here? Something like it, I’m afraid, yes.
Officials don’t want to admit failings. FAO’s chief vet Joseph Domenech has said something along lines of there being threats to food security if poultry industry is chiefly to blame. FAO had promoted fish farming with chicken manure used as feed: seems a potential reservoir for H5N1, as I saw in Indonesia:
I’ve read of China likewise using poultry manure as fish feed; even dead chickens can be used – as in my photos. HK doesn’t do this, I’m told by Lew Young, manager of Mai Po.
Poultry industry is massive – farms can have many thousands of birds. Much money involved. Attached of interest here, perhaps, albeit lengthy. [A report by GRAIN, on industrial poultry farming connection to H5N1])
Govt’s APIs regarding Buddhist releases are, in this regard, late in being introduced. Even H5N1 in wild birds records early last year indicated wild bird trade/releases was key culprit (most records were urban; yet vast majority of our wild birds are in rural areas, with key concentrations at Mai Po and elsewhere in Deep Bay).
Perhaps, then, after readily blaming wild birds – from Kowloon Park and Penfold Park outbreaks some years ago, onwards – govt here is seeing a little sense.
Post edited by: Martin, at: 2007/01/31 13:4716 February 2007 at 10:35 am #4045
A few more dead birds with H5N1 in HK city – all Kowloon.
A blue magpie: resident species.
Two silver-eared mesias: not native to Hong Kong, though breeds in forests – population established from birds escaping/released from captivity. These local birds restricted to woods. As these two were real close to the main bird market, and distant from forest, points extremely strongly to bird market as the source.23 February 2007 at 11:05 pm #4046
Post made to birdforum.net, by Mike Kilburn of HK Birdwatching Society:Quote:Another interesting discovery in Hong Kong. A friend of mine has reviewed the data on H5N1-infected birds in Hong Kong and found that in the last 2 years all the birds infected are either commonly kept as cagebirds, commonly released by Buddhists to gain spiritual merit, or urban raptors and scavengers which would be likely to prey on sick or dead birds.
Even more interesting . . .
Of the 10 H5N1-positive birds this year 8 (80%) were found within a 3km radius of the Mong Kok Bird Market and 7 (70%) within 1km!
Of the 15 cases last year the figures were 7 (47%)within 3 km and 4 (27%) within 1km.
During the same period not a single bird was discovered with H5N1among the thousands of birds tested at Mai Po.
Does this not suggest what the source might be to anyone?
Apparently not to our government’s health officials, vets or conservation staff
1. Mong Kok is one of the most densely populated places on the planet.
2. The bird market remains open and birds continue to arrive in Hong Kong
3.Our Health Minister has publicly spoken out in defence of the livelihoods of the bird sellers and has not closed the market. (priorities a la DEFRA?)
4. UN figures suggest around 1 million birds are traded through HK every year
5. A recent HK University study suggested an additional 600,000 were coming in annually from China without regulation, inspection or quarantine
6. Our Government CITES officers monitor a paltry 40,000 imported birds per year
7. Two Silver-eared Mesias – the bird which brought H5N1 to the UK last year were found with H5N1 just 200m from the Mong Kok Bird market earlier this month.23 February 2007 at 11:09 pm #4047
Following Mike’s post, a dead Common Kestrel found in Kowloon confirmed to have H5N1.
Another raptor, which could feed on sick small songbirds.
Then, news of two dead munias found in Kowloon, being tested for H5N1.
One a scaly-breasted: native to HK, but old rice fields not urban.
The other a chestnut munia: not native, known to be traded.
Have recently been media reports re ideas for limiting bird trade and bird releases in Hong Kong – but no real action taken.4 March 2007 at 10:22 pm #4048
Robert Webster’s been a key blamer of wild birds for migrating about spreading H5N1 (i’ve emailed him at times).
Now, tho, reportedly seeing some daylight re HK records of dead munias etc with H5N1.Quote:HONG KONG (Reuters) – Leading virologists urged governments on Saturday to curb the trade of wild birds as they can spread the H5N1 bird flu virus, which has made a comeback in many parts of the world in recent months.
The warning comes as Hong Kong confirmed a scaly-breasted munia found dead in late February in the densely-populated district of Sham Shui Po had tested positive for the H5N1.
It was the 13th wild bird to have been found dead with the virus in Hong Kong since the start of this year.
“The munia is not a migratory bird. Again, it points to humans and the trade in movement of birds that are responsible for spreading this virus,” said virologist Robert Webster from St Jude Children’s Research Hospital in Memphis.
Small, wild birds are bought and sold across borders and released for religious purposes in many parts of the world. The practice is particularly strong in Hong Kong, which has a huge population of Buddhists and Taoists. The city imports the small birds mostly from mainland China.
still manages to get in mention of migrating birds spreading it about, at the end – and his Trojan Ducks theory (might apply in domestic ducks, but could also be the case that vaccinated poultry harbour h5n1.
But, progress it seems.
Bird flu experts urge halt to wild bird trade13 March 2007 at 10:36 am #4049
Here’s a letter I sent S China Morning Post; published a couple of days ago.
Suppose you were suddenly grabbed from your everyday life, shoved in a cage crammed with other humans, transported and sold in squalid conditions in which many others die and you could become diseased, and you were then moved again, and dumped in an area far from your home. And the only reason for all this was that the person releasing you could gain “karma”. Would you be grateful?
That’s akin to the situation faced by hundreds of thousands of wild birds that are traded in Hong Kong each year. Their plight has been highlighted lately as some of these birds – and local birds that have eaten them – have been found dead in the city, and tests have revealed they had H5N1.
The Buddhist practice of releasing captive birds and other animals as a way of doing good may have been worthwhile originally. But today, for the most part, it’s clearly a horrible practice – involving far more suffering and death than if these releases did not happen at all.
Despite concerns regarding H5N1, the government is loathe to legislate against the practice. Yet Buddhist associations have key roles to play as well. They can surely advise Hong Kong Buddhists that if they wish to help wild animals, there are many far better ways to do so than releasing birds – or even fish – into environments that may be totally unsuitable. If wildlife truly benefits, the Buddhists helping them really will merit karma.14 March 2007 at 9:44 pm #4050
Press release from Hong Kong Birdwatching Society includes:Quote:Echoing sentiments expressed by leading virologists Professor John Oxford from the UK and the Dr Robert Webster from the United States (appendix A), Hong Kong-based microbiologist Professor Malik Peiris said that the 500,000+ wild bird trade into Hong was the most likely source of the H5N1-infected wild birds that were being repeatedly detected in Hong Kong:
“Recognizing that the natural habitats of many of these infected birds is not urban, and that the Chestnut Munia in particular no longer occurs in the wild in Hong Kong in any habitat, there is no other logical explanation for the presence of H5N1 in birds found in these highly urbanized locations. Given that such infected birds pose a threat to the poultry industry and to human health, more stringent and effective regulation or an outright ban on the trade of wild birds seems a sensible precaution,” said Professor Peiris.
The Hong Kong Bird Watching Society (HKBWS) called on the Secretary for Health, Welfare and Food Dr York Chow and the Centre for Health Protection to recognize the wild bird trade and religious releases as an important source of H5N1 introduction into Hong Kong, and to close this route for human infection by banning the trade.
“Government data shows that the most feared case for a new pandemic – H5N1 – is being found weekly in Mong Kok, Sham Shui Po and Happy Valley – some of the most densely populated areas on Earth,” said Mike Kilburn, Vice Chairman of HKBWS. “Munias and mesias – non-migratory birds commonly sold for religious release, have been clearly identified as carriers of the virus.”
You can read the release – and see map with “wild bird” cases in Hong Kong last year and this – at:
Bird Trade Bringing H5N1 to Mong Kok, Sham Shui Po & Happy Valley
Global H5N1 Experts & Hong Kong Bird Watching Society Calls for Ban
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