Monarch butterfly populations are at a critical low, according to the annual Western Monarch Count in California.
In the fall and winter, western monarchs (Danaus plexippus plexippus) stop to roost along the Pacific coast in California. Here, under the direction of the Xerces Society, nearly 200 trained volunteers find and count monarchs for the annual Western Thanksgiving and New Year’s counts, now in its 23rd year.
https://news.mongabay.com/2020/02/western-monarch-butterfly-numbers-critically-low-for-second-straight-year/
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