The variety is treated as an endangered species on the federal level.

However recent studies of differences in call and distribution have led to it being treated as a full species.

Differences in voice and size suggest that they should be treated as a separate species.

This is perhaps the most significant reason they have historically been treated as separate species.

But since 1994, new research has come out in favor of treating them as distinct species.

It is treated as an endangered species since being listed on the federal level in 1998.

Following a review in 2002, it was recommended treating these as separate species.

In fact, they have time and again been treated as a good species C. flavopectus.

"I feel we should treat them as different species."

Was, along with following two subspecies, once treated as separate species.