(easy) observe them.But once the owls fly south for the winter,(3)
(expert) aren't exactly sure where they go or what they do.Project Snow Storm is trying to solve these mysteries.(4)
(introduce) in 2013,the program uses GPS tracking devices to follow owls across the United States and Canada on their inter migration(遷徙) paths.First,scientists catch (5)
owl using a harmless net trap.Then the bird is equipped with a light weight backpack that won't affect its ability to fly.The tracker sends the bird's location back to scientists through cellphone towers. So far,Project Snow Storm(6)
(track) nearly a hundred owls.Scientists have discovered that some birds remain in the same small patch of land every winter,while others travel (7)
(hundred) of miles in a few weeks. The tracking data also shows that owls in some areas are(8)
(make) lots of short flights,which is because the birds keep having to fly away from(9)
(curiosity) people." Humans might love the birds a little too much," Weidensaul says,"(10)
you' re luck enough to see one,give it plenty of space."