Good blend, but the background hues are too close to your creature's...try to make it stand out more.

Really nice! Blending is very good; maybe you would like to add some orange or teal tint to the image just to create a mood, but that's just IMO Good luck anyway!

Thank you for the comments guys!

I arranged the BG, I gave it a certain distance ... Hope I have been good!

Author, I don't see any difference.
EDIT: Looks much better now IMO.

The frog-snake is too similar in tone to the grassy background. Perhaps a wee bit of a warming filter on the background to give it a hint of a color difference...

the frog-part is too sharp compared to the snake part, should be the same sharpness, then will it look a whole.

To make the picture more interesting, should let it coil-up a prey... etc. The background cannot bring out the creature as the main focus.

The legs, to me, is not necessary

I disagree with all of the above!

Great blending, great find of sources and great thinking about the colors. This would be a species that would benefit from having colors which blend in the surroundings. Good entry!

Guys, thank you for all the tips! So many that I even lost on what I should change.
So let's share:

MossyB & Lamantine: BG, I left in a lighter green than the creature.
Really everything was matched before, but I have not changed much, ok? Thanks!

CMYK: what I'd done before was to cut the top of the sky, sorry, I had not really changed the tone, I've forgot that. But now, yes! Thanks!

Aheman: the sharp decrease of the frog's head, I hope you can see the difference. But I decided to keep the little leg, I thought it would be a way to be different ... But thank you!

Rob: Thank you for approving the work the way it was, but at some points I had to agree with people above.
However, I hope that the changes have not been much disapproved by you, after all, are still consistent. Thank you!

Nifty!!! (and that's all I gots to say. hehehe)

i love it and find it very believable... but would have liked to see it on rocks... more the place you might expect to find a rough scale critter ilike this

It really does look like a new species, GL!