They are one of a group of insects commonly referred to as pests. It could just as easily have said "Many people think ants are pests".

Student or Learner
"Many people think ants are a pest." Could anybody please explain why the usage of the indefinite article is correct in this sentence? Thanks.
They are one of a group of insects commonly referred to as pests. It could just as easily have said "Many people think ants are pests".
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
Could you give some other examples including this structure (plural noun + plural verb + a + singular noun?)
Some people think spiders are a pain in the neck.
Many people think that traffic wardens are a nightmare to deal with.
Very few people think film directors are a marvel.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
Thank you so much.