Wow I love that picture!! Do you take lots of pictures of swans? If you do you should go to the Swannery in Abbotsbury, in England. That's where I took all my swan photos (they aren't tame they just stay there if they want too). Would you mind having a look at some of mine? (Sorry I'm asking so many questions.)
Yes, I visited Pangkor Island as well, but only for a couple of days to relax a bit before heading south to Singapore and Indonesia. I remember staying in a small fishing village with a nice beach and very few tourists, but that has probably changed a lot since then. I took hundreds of colours slides from that trip that still need to be digitized, but I have posted a few here if you like to see them [link]
Which lens you take for your animal pictures. I've just bought the Sigma 120-400mm and there is still much to exercise such good pictures as you make it. But I already know I need a converter, I think I'll try with 1.4. Do you have experience with the Sigma or the Nikon or Nikon is the best of Kenko.
Most of the time I use this lens: Nikkor 300mm f/4D ED IF AF-S. You can read a review here: [link]
I don't have any experiences with Sigma lenses, except for the 10-20mm wide angle lens. I just checked your gallery and the shots of the Snow Owl are very nice. Just keep shooting and practising with your 120-400mm and you will get more good results. If you prefer to shoot handheld, you should definitely choose the 1.4x converter, since the 2x is very difficult to use without a tripod. I think Kenko's converter is better (more useful), since Nikon's converter is only for manual focus, even it's much more expensive.