YOU SAID:
Vampire bats are bats whose diet consists of blood
INTO JAPANESE
吸血コウモリ(きゅうけつコウモリ)とは、食事が血液で構成されるコウモリのこと。
BACK INTO ENGLISH
Blood-sucking bats are bats whose diet consists of blood.
INTO JAPANESE
吸血コウモリは、食事が血液で構成されているコウモリです。
BACK INTO ENGLISH
Blood-sucking bats are bats whose diet consists of blood.
That didn't even make that much sense in English.