NOVA - Season 36 Episode 10
Orange-and-black wings fill the sky as NOVA charts one of nature's most remarkable phenomena: the epic migration of monarch butterflies across North America. To capture a butterfly's point of view, NOVA’s filmmakers used a helicopter, ultralight, and hot-air balloon for aerial views along the transcontinental route. This wondrous annual migration, which scientists are just beginning to fathom, is an endangered phenomenon that could dwindle to insignificance if the giant firs that the butterflies cling to during the winter disappear.
First Air Date : 1974-03-03
Last Air date : 2024-10-09
Runtime : 57 minutes
Genre : Documentary
Cast :
Crew :
Quality : 
Subtitles :
- Season 36 : Episode 12008-10-07
- Season 36 : Episode 22008-10-14
- Season 36 : Episode 32008-10-21
- Season 36 : Episode 42008-10-28
- Season 36 : Episode 52008-11-11
- Season 36 : Episode 62008-11-18
- Season 36 : Episode 72008-11-25
- Season 36 : Episode 82008-12-30
- Season 36 : Episode 92009-01-20
- Season 36 : Episode 102009-01-27
- Season 36 : Episode 112009-02-03
- Season 36 : Episode 122009-02-24
- Season 36 : Episode 132009-03-24
- Season 36 : Episode 142009-03-31
- Season 36 : Episode 152009-04-07
- Season 36 : Episode 162009-04-14
- Season 36 : Episode 172009-06-30
