It has had over 500 participants, and each year has a different environmental focus that is taught by staff naturalists.

A trail wends gradually down to the Raquette River, with two attractive lookout points, and a staff naturalist is available to lead museumgoers on guided walks.

Hike with a staff naturalist to the farm's vernal ponds.

That's why I told him our staff naturalist would keep her busy.

As a scientist, Watts worked at the Morton Arboretum in Lisle, Illinois, as a staff naturalist.

At 1 and 2 P.M. each day the butterflies drawn to native plants will be observed, with staff naturalists noting which plants attract which butterflies.

In the ship's central corridor, Margie McGregor, the cruise's coordinator and staff naturalist, posted a list of wildlife seen during the cruise.

A two-hour tour of the game preserve with a staff naturalist, which takes guests into areas off-limits to other visitors, costs $27, $20 for ages 4 to 11.

It was easier to appreciate the shoreline during a morning row I took with a staff naturalist named Brian and nine others.

On Saturday at 8 P.M. a moonlight walk for singles will be led by staff naturalists along the center's trails.