Between 220 million and 270 million butterflies froze and fell from their tree roosts, covering the ground to a depth of more than a foot [30 cm] in some places. While it is felt that the species is not threatened by this loss, the researchers said that their reduced numbers left the butterflies vulnerable to future events of weather and disease. The monarchs are noted for their spectacular mass migrations northward from Mexico each spring. They lay eggs in the southern United States. These develop into more butterflies to continue the migration, which reaches as far as Canada by summertime.
ზუსტად, მაგრამ, ამავე დროს, პოეტურად აღიწერება ნიამორის (გარეული თხის) მაკეობა, აგრეთვე გარეული ვირისა და ბეჰემოთის გავრცელების ბუნებრივი არეალი “.