A textbook says...

[dido4]

Here is the quote from a textbook:



Bill : No, I'm going to watch the black-faced spoonspills there.

Brown :What' that?

Bill : They are a special kind of birds.



1. The author siad that "birds" should be replace by "bird".

That means the "s" at the end of the word bird is wrong.

2.Why?

3.Can't we put s at the end of the word, bird, here.



thank you

[Casiopea]

. . . a special kind of bird.
. . . a special kind of flower.
. . . a special kind of vegetable.
. . . a special kind of book.

[dido4]

Thank you for giving examples. Here's another one.

Q1.Can we use the sentence "They are one of the special kind of birds." to express that one of the kind?(Q2. Or have to use They are one of the kinds of birds?)

There are many kinds of birds, but the black-faced spoonbill is one of the kind of birds. (Q2. Or have to use one of the kinds of birds?) I mean how to express one of the kind of birds.

Thank you very much.

[Casiopea]

Both sound awkward:

[1] They are one of the special kind of birds.

[2] . . . the black-faced spoonbill is one of the kind of birds.