Many monarchs in a cluster
This is one of a very small number of clusters of monarchs that can be found today at Natural Bridges.
According to the experts, the reason for the dramatic fall in numbers is a general loss of milkweed throughout California, a plant that is required for the breeding of monarchs.
Now, as the population of monarchs that "overwinter" from late October through early March falls to dangerously low numbers, there is hope in the form of organized efforts to increase the amount of milkweed that is grown in California and elsewhere.
December 9, 2010 4:00 AM PST
Photo by: Daniel Terdiman/CNET
| Caption by: Daniel Terdiman
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