Archive for November, 2011

Monarch butterflies return in surprising numbers

Published on November 23, 2011

By: Mary Flaherty, The San Francisco Chronicle

Monarch butterfly naturalist Adrienne De Ponte had a surprise waiting for her this fall when she arrived in the San Leandro grove where she’s been leading tours for 11 years.

After witnessing fewer and fewer butterflies appearing each autumn to overwinter in the grove, this year she found 5,000 of the orange- and -black butterflies clustered in the eucalyptus trees – up from 3,000 at their peak last year.