Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Category: moral characteristic 
Words: concise, frank, matter of fact, pork, blunt
pork

Category: outdoor sport activity 
Words: hiking, climbing, mice, fish, row
mice

Category: bird 
Words: winch, crane, goose, neck, flamingo

winch