As the only accommodation within 171,000 acres of a 'critical habitat area' - millions of birds migrate and nest here - it's a recipe for contemplation, not claustrophobia.

Knowing that the sand tiger sharks return to specific ships means conservationists can try to get a handle on their numbers and designate critical habitat among the wrecks.

Finally, we found that many endangered species, particularly plants and invertebrates, experience high levels of noise pollution in their critical habitat – geographic areas that are essential for their survival.

Hundreds of lakes and marshlands in this region provide critical habitat for migratory and nesting bird species.

The wilderness also offers some of the most critical habitat for wolverines in the lower 48 states.