Scientists from several countries urged Mexican authorities to immediately halt logging in the Monarch Butterfly Biosphere Reserve and promote the regeneration of the forests that form its habitat, in a published letter in the current edition of the journal Science .
The California overwintering population has been reduced to less than 0.5% of its historical size, and has declined by 86% compared to 2017. Each year, during a three-week period around Thanksgiving, scores of volunteers fan out through coastal California to find and count overwintering monarch butterflies as part of the Western Monarch Thanksgiving Count.
You may be noticing more monarch butterflies in your backyard this year than in past years. If so, you’re not alone. Researchers estimate that this year’s monarch population is at the fourth highest level since 1993 — one of the highest of the past 25 years. Some experts anticipate the butterfly’s fall migration currently underway to be the strongest since 2008.