YOU SAID:
A murder of crows fly over my house.
INTO JAPANESE
カラスの殺人事件が私の家の上空を飛んでいます。
BACK INTO ENGLISH
A murder of crows is flying over my house.
INTO JAPANESE
カラスの大群が私の家の上空を飛んでいます。
BACK INTO ENGLISH
A flock of crows is flying over my house.
INTO JAPANESE
カラスの群れが私の家の上を飛んでいます。
BACK INTO ENGLISH
A flock of crows is flying over my house.
That didn't even make that much sense in English.