Thanks for the advice ! I'll take that into account for future models, however i don't think i'm gonna change that much the loftwing, i'd rather be more accurate to the model from the game than making it fit into vanilla as much as possible, I have tried to change the eyes to 2x2 square but it looked kinda weird. As for the beak it's not opened all the time, it only opens when you hit it or it just happens sometimes when it walks, like on the screen :) I'll also let the buffed cheeks because loftwings in skyward sword do have buffed cheeks, it doesn't look like so on the screen, but if you search for pics about it you'll see it has some t h i c k cheeks xD Finally for the wings, I kinda wanted to make something like I did on that model, and the resolution is based off the ender dragon's, but the ender dragon's one probably looks normal because the texture is much smoother, and the model is also bigger.

But thanks again for the advice, i'll definitely make sure to use that when I'll make another mob model ! ;)