North American Butterfly Association
A city park in Fremont
Alameda County, CA
Partly sunny, low 60s. This site had previously been an over-wintering location for Monarchs. On January 10, 2012, according to park staff there were an estimated 4200 Monarchs there that day. They said on a normal year only 200-300 Monarchs stayed over-winter but a wet winter the previous year helped boost the numbers. Last year (2018) an estimated 10 Monarchs over-wintered there and this year only 5 have been observed. The pictures were taken 01/10/12.
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