Arctic terns are summer residents, returning to nest in the wetlands after wintering some 12,000 miles away in the antarctic. Unlike the loons, these birds are graceful fliers as well as tenacious nest defenders. The canoer or hiker unlucky enough to stumble into a nest site is likely to be repeatedly dive-bombed by screeching terns. Moose are the most common large mammal in the park, although their numbers are dependent on an adequate food supply. They prefer brushy areas or shallow ponds with tender aquatic plants, as browse in mature forests is beyond even their reach.
Black bears are common throughout the park, but grizzly and brown bears are occasionally sighted.
Adverse encounters with bears are unlikely if proper precautions are taken. Sighting a bear in its natural environment is one of the thrills of the back country. Please report any sightings to the park rangers. All litter should be removed or placed in litter containers provided. Please pack out what you pack in, and leave your campsite as you found it.