YOU SAID:
butterflies fly high in the sky while cats crawl down on the ground becuase they are mammals
INTO JAPANESE
蝶は、彼らが哺乳類であるので、猫が地面に這い下がっている間、空に高く飛ぶ
BACK INTO ENGLISH
Butterflies fly high into the sky while cats crawl to the ground because they are mammals
INTO JAPANESE
蝶は空に高く飛び、猫は哺乳類だから地面に這い上がる
BACK INTO ENGLISH
Butterflies fly high into the sky and cats crawl to the ground because they are mammals
INTO JAPANESE
蝶は空に高く飛び、猫は哺乳類なので地面に這う
BACK INTO ENGLISH
Butterflies fly high into the sky and cats crawl to the ground because they are mammals
That didn't even make that much sense in English.