As with most other commenters on this piece, I too see artists going either all draconic or all insectiod with their designs. This piece however is a good balance between the two, and I must say I love it to pieces. Realistic headcanon accepted!!!
It's wings should be a little bit bigger and wider in order to realistically support it's massive weight (at least as big as it's body, like the official Pokemon sketch), but other than that, it looks amazing!
The wings are actually more or less the same size as the one shown in the original anime drawing (which, under scrutiny, may not provide flight on their own. Wing beats per second, and other biological structures such as hollow bones also come into play).
I don't base my interpretations on type or egg groups, but merely on its design. I've seen much more insectoid interpretations of Flygon that suggest it is fully an invertebrate and thus fits in the bug egg group better than mine. I depict it as half bug, half reptile, so-to-speak. Realistically, it would have it's own taxonomic class and thus an egg group of its own
One of my favorite dragons. I like how you combine aspects of insects and dragons in this piece, like the fine hairs dotting parts of the back and the combination of dragon-like wings and butterfly-like wings.
I just found this image on Pokestache.com and the uploader didn't credit you at all. I saw people asking the uploader for requests, so I wrote a comment where I said you are the original creator of this image and asking people to go to your gallery to see more. Is that okay with you? I just really think all credit should go to YOU, the real artist, and not the guy who uploaded it on another website without your consent.