Because of their ferocious attacks and their claws and teeth.
Frightening
The Frightening was created in 2002.
Wolves are very unlikely to attack people. (the least likely land predator in the world to attack people) But because they are seen as the feral dog they are frightening. My personal opinion is that Wolves are smart enough they have learned not to attack humans.
The word "frightening" is an adjective and does not have a plural form. Adjectives in English do not change to reflect number. If you are referring to something that is frightening in plural, you might say "frightening experiences" or "frightening situations."
more frightening
The duration of The Frightening is 1.42 hours.
That movie was frightening .
The noun for frightening is "fright" or "fear."
Freedom Is Frightening was created in 1973.
Lightning Frightening was created in 1970.
The prospect of spending the night in the haunted house was absolutely frightening. Walking in the woods can be frightening if you are alone.
The frightening ordeal was finally over. was = verb frightening = adjective ordeal = noun