Thor is a Griffin! :D Half Lion and half Crested Serpent Eagle. (I mean really, I hope you didn't think I was going to go with Bald Eagle). He comes to Midgard and people just get weird vibes from him, he has wings and a lion's tail! Who does that? This happy go lucky god does. I really wanted his animal half to look hardcore, thus Crested Serpent Eagle, and as a god I wanted him to still be mythical ... thus Griffin ^__^ <3.
I wanted his animal self to be bigger than average but not too huge, so I settled for making it larger than a normal lion would be but he's probably on part with Steve and smaller than Bruce.
This was a lot of fun. :D
Crested Serpent Eagle - Haematornis undulatus (now Spilornis cheela)
The crested serpent eagle is a medium-sized bird of prey from the tropical regions of Asia. Its genus, Spilornis, is a member of the Circaetinae subfamily, which comprises all of the snake-eagles. As their name suggests, these birds subsist mostly upon snakes and reptiles, and as such most of them live in warmer climates, where serpents are plentiful.
A Century of Birds from the Himalaya Mountains. John Gould (illustration Elizabeth Gould), 1831.