Is it not possible this just refers to a Fork-tailed Sunbird?
Not exactly "bright yellow" I know, but it is more "warbler-sized" than Mrs G's, and a LOT more common.
Here's one I photographed last week in Sai Kung, by way of attempting my first photo attachment.
Mike Turnbull
[ Last edited by tmichael at 6/01/2009 22:40 ]
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6/01/2009 21:18
Fork-tailed Sunbird (male) Sai Kung, 30/12/08