The thing is, everyone's displays are slightly different. This is, personally, what I hate most about photography online. What I think looks awesome on my display won't look anything like it on yours. I've been having this at work lately. It annoys me. I want to shove an colour chart at them and tell to take another look when their display matches it.
Anyway.
The sky could just be hazy and slightly overcast - it's still got some blue in it mind you.
I'd imagine there's a fair bit of dust blowing around as well, so that'll affect the colours.
The greens, maybe they are that green. It's a different country, the light will be different, and so will the wildlife.
I'd imagine that the photographer has also probably lifted some areas for clarity, if they knew that the end result was going to be a tiny box on the BBC site.