What is the collective noun for thrush?

There isn't a specific collective noun for a group of thrushes.

However, you could use a general term like:

* A flock of thrushes

* A group of thrushes

* A gathering of thrushes

You could also use a more descriptive term based on the specific situation, like:

* A chorus of singing thrushes

* A flurry of thrushes foraging for food

* A cloud of thrushes in flight