The other thing used to attract the bats to their new home is one source of the odor that humans find so offensive - their feces.
(The other thing; used; to attract the bats to their new home) (The other thing used to attract the bats to their new home; is; one source of the odor) (the odor; find; so offensive)
The other thing The other thing used to attract the bats to their new home the odor
used is find
to attract the bats to their new home
one source of the odor
so offensive