How many birds are in the flocks that bluebirds form?

so that they can all protect each others babys that are flyin while migratin More Birds also form flocks at other times besides migration, and even when there are no babies in the flock. They...

3 OR MORE.

The word flock just means a group of birds of any size.

A flock is not made up of a specific number. We can say, its made up of a group, or many. They live, travel, and feed together as a group. Still, there is no specific number that constitutes a flock.

In US English, because you are referring to the flock, which is singular, it would be : The flock of birds IS... In British English you would normally say: The flock of birds ARE ... Group words such...