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Old Comments:

2010-03-11 15:59:59
That TV program showed the Monarchs resting in a fairly big group, but probably not as big as the one on the photo. I know that the Canadian Monarchs migrate to Mexico, at least based by that TV program and other sources. It's not only them that head south for the winter; we Canadians also do...when retired. Americans refer to us as the Snowbirds ;-)
2010-03-11 15:18:09
No, I didn't ask them Connie, it was self evident. The photo shows the Monarchs exhibiting the clustering behavior that they only exhibit at the journey (migration) end. There is no clustering before this point although at times a group of less than a hundred will come together to rest just for one night. There are eleven sights in the mountains of Mexico where these butterflies cluster together at the journey end and it is always on Oyamel Fir trees that would not be found anywhere along the route. Monarch butterflies on the West Coast (California, Oregon or Washington) do not migrate to Mexico instead they migrate to smaller overwintering sites in Southern California where they congregate in much smaller numbers and overwinter on Eucalyptus trees.
2010-03-11 08:53:00
I know the migrating story of the Monarchs. There was a particularly good TV program on it a couple of years ago. I used the comment I found in that blog. Did you ask the butterflies if they were on their final leg of the journey or they had already reached it;-)
2010-03-10 18:17:41
The Monarch butterflies (Danaus plexippus) were not migrating but rather had completed their long migration journey and were photographed at their overwintering site (near Morales, Mexico) after they had flown over 1000 miles (in the migration) from the Central United States and Canada to Mexico. In the spring, they will start another migration journey and return northward.