Tropical butterflies have landed in Colorado. The Butterfly Pavilion and Insect Center just outside of Denver features scarlet mormons, zebra longwings and more than 100 other varieties that fly through glass-enclosed buildings. While at least 30 butterfly centers have emerged in the past decade - most of them associated with zoos - the 7,800-square-foot pavilion is America's only nonprofit facility dedicated wholly to butterflies. A brainchild of the Rocky Mountain Butterfly Consortium, the pavilion received support from private and corporate donors and the city of Westminster, which provided the land. When the butterfly mecca celebrated its first anniversary July 14, some 130,000 lovers of six-legged creatures had already visited. For more information, contact the Butterfly Pavilion at 6252 W. 104th Ave., Westminster, CO 80020 (303/469-5441).