wgeoff

The terns currently around the Po Toi Rock are three species, Bridled, Black-naped and Roseate.
Most of the terns in your photo are Bridled (the dark ones), the white ones are probably mostly Black-naped but with some Roseate.
See my report on Po Toi this week here

http://www.hkbws.org.hk/BBS/view ... 1557&highlight=

I don't think the fishing boats off-shore disturb the terns - they are often in a wheeling mass at this time, nesting has mostly finished.

wgeoff

Hi Eric

It's a mixture. Some are adults which have bred on the island, some are juveniles from this year and a few may be just passing through migrants.
But they will all leave by the end of September, going south to the islands of Indonesia and northern Australia where they will spend the winter, returning here next April.

wgeoff

The restaurant is usually open for lunch during the week.
But it is quite expensive.