Bat (Franchise)

Bats are an animal seen occasionally in the How To Train Your Dragon Franchise.

Description
Bats are seen on occasion flying through caves. They are usually a media blur, and hard to get screenshots of. They are black and usually screeching.

In actuality, while Bats can be black in color, they can also be grey and brown. Bats are the only fully flight-capable mammal on the planet and are found worldwide. They serve important environmental functions such as keeping insect populations in check and pollinating flowers. Bats are a large Order of mammal (Chiroptera) with over 1,000 species across the world. A few species Vikings may have encountered include: Northern bat (Eptesicus nilssonii), Common Pipistrelle (Pipistrellus pipistrellus), and the Common Noctule (Nyctalus noctula).

Dragons: Race to the Edge, Season 2
When Fishlegs and Hiccup travel to Lycanwing Island to get to the bottom of the Lycanwing curse, a flock of bats fly screaming out of a creepy cavern they must enter.

School of Dragons
There are bats flying around the cavern roofs in the Whispering Death tunnels beneath Berk.