fun fact: there's a species of bird called a ptarmigan
the name ptarmigan has no good reason for having a p in it at all, and it was spelled tarmigan for a long time before someone thought "well surely this comes from the greek ptero-, we should put a p there" and got it spelled ptarmigan in the dictionary
there is no relation between the words (p)tarmigan and ptero-. tarmigan comes from a Scottish Gaelic word, about as unrelated to Greek as you can get while still being Indo-European
-F