Think about it, how can a nest be made on a tree like that?

Idea is interesting, but Ressiv has the point; nest needs at least a branch to hold it. Or a hole in the trunk.

I agree with Ressiv and erikuri, but I think the intent was to imply a hole in the tree with the depth of the nest itself. Perhaps some more shading would create more depth (under the nest, perhaps). Nice blend regardless. Good luck.

I guess, I missed some details to put the bird's nest with... well, Thanks for your comments I got enlightened^^

great idea ! g l

a hires would be nice

not a bad idea