I'll do a comment for each photo haha.
Andy:
I really like this. I'm impressed, first, at how you managed to get so close to a duck without it flying away

I tried to do it the other week and failed miserably. Also like how a swan has managed to filter its way in. If I had to be picky, I'd criticise how the duck is sort-of positioned away from the camera, and such it's not ideal. But I think you've captured the theme well, and creatively.
Christina:
Using an old picture? How blasé.

But I like it. However, I think a bit more colour could have been used, and this doesn't seem very 'natural' to me. As much as I like (and have taken before) these sorts of pictures, they're very edited and not very natural at all. :\
Twilight:
Hmm, I like the thought behind this picture. Weeds are often seen as an irritation, but you have made the dandelions look quite pretty. I like it, well done.
Firewire:
Whilst the smell of freshly-cut grass is indeed lovely, this picture is not, I'm afraid. I'm not sure what made you think "a box of grass" would be nice if I'm really honest

A different idea, but not a good one.
Fom:
Err...it's a different idea. I like the creativity behind the photo, but if I'm honest I think it could be better. Perhaps it's compared to the other photos, and I'm not sure what kind of technology you used, but I'm not keen on the overall quality. I'd give it a 6/10.
Mr.K!:
Wow! I love it! A little bit blurry around the edges if I'm being picky, but it's a great shot.
Locke:
Amazing self-portrait. I kid

You've ticked all the boxes here - open field, animals frolicking, it's the ideal picture. Well done.
J
Wow, this is my idea of Hell personally haha. The cliff, that is, not your photography lmao. A really impressive and stunning photo, it'd probably be my favourite if I didn't hate heights/rocks haha.
Conor:
WOW. That's all I can say :|
Sam!:
Not everyone has the advantage here of using the Grand Canyon in their picture

Not a lot of effort really I suppose, but it's hard to be critical about such a stunning location.
SiaSiaSia:
Awww, so cute. I'm a sucker for cute things. Let this be a lesson for all future photos
Brona:
Wow, a great competition here. I didn't even notice the bee at first, so to get that in is a brilliant bonus. Bravo.
Well done all!