Good work!
I like all the little details in the picture, especially the Cornish pixie! Did you use an image for reference? The only critizism I have is that Legolas' hands are a little too small :)
But the posture, clothing, hair, tree and creatures are all very well made!
You know, elves are always willing to help nature and its animals, so if Legolas by any circumstance met a thestral and a pixie in need of help, I think he would do all in his power to help them.
The nature of the Thestrals are rather sad, I think. They can only be seen by those who have seen death, and accepted it. Harry thought that the wagons that went back and forth to Hogwarts moved themselves all the years, and he wasn't able to see them until he had witnessed and accepted the death of Cedric Diggory!
Also makes me think about Luna Lovegood, who saw them since she was 11 and starting at Hogwarts, the poor thing! She could never mention it to anyone: invisible, skeletal/rotting horses with wings pulling the wagons? I doubt anyone would believe her.
Anyway, keep it up, N!
-E. A. J. /JamesHatfeld