For those with a budding interest in lepidoptery (the study of butterflies), this fine online resource presented by the USGS's Northern Prairie Wildlife Research Center will be worth checking out. Currently, the site covers the butterfly species and populations throughout the United States and northern Mexico, with a section on Canada planned for the future. By utilizing the interactive map,...

Journey North, an Annenberg Media "Learner Online" science education program, uses the Internet to track migration and signs of spring. Each year, students and teachers across North America go online (beginning on Groundhog's Day), to share their observations of the changing seasons. Targeting K-12 and high school students, the colorful homepage offers several interactive features -- from student...

Where do butterflies journey each year? Many in North America end up in a sanctuary in the highlands of Mexico and NOVA has the complete story on this remarkable migration. To capture this story, NOVA's filmmakers used a helicopter, ultralight, and hot-air balloon for amazing aerial views along the transcontinental route. Visitors can watch the entire program here, including a number of great...