• Early Thanksgiving Counts Show a Critically Low Monarch Population in California

    Xerces Society are still completing the count for this year, but preliminary results from the Western Monarch Thanksgiving Count (WMTC) show disturbingly low numbers of monarch butterflies overwintering in California.

    Preliminary count results from 97 sites, which includes many of the most important overwintering groves, show only 20,456 monarchs. In 2017, these sites accounted for 77% of the total monarch overwintering population, hosting approximately 148,000 monarchs. The 2018 numbers represents an 86% decline from 2017—which was already a low population year.

    We were not expecting this to be a great year because we knew it had been a rough season in the breeding and migratory range, but it’s looking worse than anyone had expected. If the rest of the Thanksgiving Count data show the same trend as these sites, we anticipate seeing less than 30,000 butterflies overwintering in California this winter. In comparison, last year there were more than 192,000 butterflies counted; in 1997, it was estimated that more than 1 million overwintered; and research suggest that there were at least 4.5 million monarchs overwintering in California in the 1980s.

    If you want to read more about the count and what may be causing this abrupt fall in numbers, please see an article on our blog, (https://xerces.org/2018/11/29/critically-low-monarch-population-in-california/).

    posted to Cedar Street Times on November 29, 2018

    Topics: Butterflies, Front PG News

    Comments

    You must be logged in to post a comment.



  • Cedar Street’s Most Popular

  • Beach Report Card

    Loading...

    This is the Heal the Bay Beach Report Card for Monterey Peninsula beaches, which reports water quality grades, or when relevant, weather advisories. An A to F grade is assigned based on the health risks of swimming or surfing at that location. Look at the "dry" grade for all days except those "wet" days during and within 3 days after a rainstorm. Click here for more information on the Beach Report Card. Click the name of the beach when it pops up for more details, or choose a beach below.

    AsilomarCarmelLovers PointMunicipal Wharf 2 (Monterey)Upper Del Monte Beach (Monterey)San Carlos Beach (Cannery Row)Stillwater Cove (Pebble Beach)Spanish Bay

    adapted from Heal the Bay, brc.healthebay.org
    subscribe via RSS
    stay safe on the go: app for iOS or Android