Did you ever hear/see a cuckoo bird?

[sitifan]

1. Did you ever hear a cuckoo bird? You can hear it in spring.
2. Did you ever see a cuckoo bird? No, I never saw one before.
Source: Junior High School English, Book 3, Lesson 10.

In the above quotations, are "it" and "one" interchangeable?

 

[teechar]

1. Did you ever hear a cuckoo bird?

That's unnatural. No native speaker would say "cuckoo bird". They would just say "cuckoo".

2. Did you ever see a cuckoo bird?

Same comment as above.

In the above quotations, are "it" and "one" interchangeable?

No.

 

[Tarheel]

Try:

Have you ever heard a cuckoo?