Successful reproduction is very rare, making the species highly endangered.

It is highly endangered due to habitat fragmentation and a small population.

Dusner is highly endangered, and has been reported to have just three remaining speakers.

Most speakers are elderly or middle-aged, making it highly endangered.

The taxonomic position of the Chinese population, while also highly endangered, is more confusing.

These primitive breeds decreased in numbers during the last decades, some are highly endangered.

The species is highly endangered and has been extirpated in some parts of its range such as Pakistan.

Of the many species alive today, some are highly endangered.

But, of the many species alive today, some are highly endangered.

The language was unknown beyond its immediate area until 1990, and is now highly endangered.