There have been a lot of debates since 10 years ago. Please refer to the following thread:
http://www.hkbws.org.hk/BBS/view ... &extra=page%3D1
To cut it short:
1. Terns will be disturbed when people land on tern islands during the breeding season
2. Photgraphers are a particular threat, especially because they have a lot of motivation to stay in the core area for hours
3. Fishermen also produce some disturbance, but they mostly stay at the waterline. The birds will get used to their presence as long as they stay there and won't enter the core area. (You can readily appreciate the stress to the birds from their behaviour. When people are inside the core area, they circle high above making all sorts of calls - very similar to the case when a Peregrine Falcon is around. When fishermen are staying at the waterline, the birds generally ignore them, although they have to rest elsewhere on the island)
4. As bird lovers, we have to demonstrate our commitment to put the birds' welfare before good photos
5. For publicity, we need a simple clear-cut message, with no if's, but's or perhaps. We aim for zero disturbance, so no landing even outside the "core area".
6. Fishermen do not show photos of birds, and they don't care
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Last edited by BWA at 29/07/2013 13:05 ]