Impressive work. You've outdone yourself once again. Now, where do I begin...? Oh, the sand's texture is absolutely perfect: it looks like it'd feel rough like normal sand would. The water's texture, once again, looks like I could just jump in (and I kind of wish I could, actually: I'm more in the mood for swimming then critiquing, but what the hey?). I also see some nicely placed shadows that all follow the main point of lighting you've inserted-it really gives it a more realistic perspective. The clouds look pretty realistic to me: as clouds are sometimes half transparent like in real life: another good way at creating a realistic affect for the viewer. It's a nice touch that you've added some life (aka, the birds) to liven up the scene even more. And what island would be complete without a few trees? The trees were very nicely done with the different shades of green to liven the plant-life up more then just one shade of green being used would have done. Overall, it feels like I'm actually sitting there on the island then here at my computer (which I would much more prefer right now, to be honest. X) ).
Pretty! the parrot is a nice touch. The only problem to me is the water doesn't look quite right receding into the distance, I think mainly because it is missing a horizon line and just kind of blends from sea to sky.