Natural Habitat Adventures, based in Boulder, Colo., is offering a similar itinerary.

Natural Habitat Adventures will take groups of 10 to 12 travelers to Michoacan for seven five-day tours.

Natural Habitat Adventures, a Boulder, Colo., company, has added a new Alaska wildlife itinerary.

The new campaign was the idea of Ben Bressler, the founder and director of Natural Habitat Adventures, an upscale environmental travel company based in Boulder.

Here are two: Natural Habitat Adventures, based in Boulder, Colo., has a 13-day safari with departures on Oct. 12, Nov. 2 and 23.

Natural Habitat Adventures, based in Boulder, Colo., is offering 12-day tours, with departures on Feb. 15 and March 1.

Natural Habitat Adventures, 2945 Center Green Court, Suite H, Boulder, Colo. 80301; (800) 543-8917.

Last January I visited the sanctuaries on a five-day tour offered by Natural Habitat Adventures, a tour company based in Boulder, Colo.

If you go Natural Habitat Adventures runs tours to see the monarchs from early January until mid-March.

Natural Habitat Adventures, based in Boulder, Colo. offers several five-day trips; departure dates include Feb. 15, 18 and 21.