Loss of habitat and the introduction of non-native species have contributed to the decline of the frog, which is a candidate for listing under the Endangered Species Act.
(Loss of habitat and the introduction of non-native species; have contributed; to the decline of the frog) (the frog; is; a candidate for listing under the Endangered Species Act)
Loss of habitat and the introduction of non-native species the frog
have contributed is
to the decline of the frog
a candidate for listing under the Endangered Species Act