User blog comment:Httyd big fan/Idea for New Badges/@comment-27624304-20170605193334/@comment-23825763-20170605210641

Many of those are just based off of names of various things in the books. The Blue Whale comes from Stoick's ship in the books, as does Hawk. The Falcon comes from a title that Humongosly Hotshot recieves. The Sharkworm is described as looking like a Hammerhead Shark. Puffin Island exists and Fishlegs' ship is the Hopeful Puffin. Penguin is part of a boat name as well as on the Fat Consul's menu list. Dove's are killed by Sidewinders in the Roman Colleseum before they themselves are killed by Flashfangs.

As for some of the franchise animals, the vole, toad, snail, and bat come from the meats that the twins want to feed Barf and Belch in the minicomic Smeltdown. Arctic hare footprints can be found in School of Dragons on Icestorm Island. A fly appears in The Eel Effect and Raincutters are known to eat grubs. Razorwhips eat Sea Slugs and a seagull is mentioned by Froglegs in the HTTYD game. Snakes and Earthworms are mentioned in the School of Dragons quest "The Wolves are Coming."

I hope this clears up where I got this information from. If you need any of these removed, I can do so as soon as possible.