The episode is pretty good and try to explain who the monarch butterfly struggles that it's have to go through from Canada to Mexico and why it's a mystery on how they do it and the monarchs are Beautiful 🦋 but someone who afraid of butterflies like me, some of the shots like the up close shots are ugly, and frightening! Good for the education, bad for somebody with a butterfly phobia. Overall a very good episode of the 2009 Nova season from wgbh and pbs. I highly recommend it so if you find it on the tv schedule or dvd please watch. I found the episode's dvd at my local library the day before.