Question

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.

Explanation:

The two independent clauses ("A flock of starlings...is called a murmuration" and "hundreds or even thousands of birds seem to move in unison") are related in meaning and need a semicolon to connect them, as a comma alone would create a comma splice. A semicolon is appropriate here to show the relationship between the definition of a murmuration and the description of the birds' movement.

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.