add a comma or semicolon if needed. otherwise, submit the text without any additional punctuation. a flock…

add a comma or semicolon if needed. otherwise, submit the text without any additional punctuation. a flock of starlings, turning and twisting through the sky together, is called a murmuration hundreds or even thousands of birds seem to move in unison.

add a comma or semicolon if needed. otherwise, submit the text without any additional punctuation. a flock of starlings, turning and twisting through the sky together, is called a murmuration hundreds or even thousands of birds seem to move in unison.

Answer

Brief Explanations:

原句中“A flock of starlings, turning and twisting through the sky together, is called a murmuration”和“hundreds or even thousands of birds seem to move in unison”是两个独立的句子，且存在一定的逻辑关系（解释说明关系），用分号连接可以使句子更连贯。

Answer:

A flock of starlings, turning and twisting through the sky together, is called a murmuration; hundreds or even thousands of birds seem to move in unison.