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Monarch Joint Venture Blog

Eastern Monarch Butterfly Population Falls to Less than One Hectare in the 2023-2024 Overwintering Season

Feb 07, 2024

Categories

  • Migration
  • Population Trends
  • Recent Research
  • Important Monarch News

Monarch butterflies occupied 0.9 hectares, 1.31 less than the 2.21 hectares in the 2022-2023 overwintering season. This is the first time since the 2013-2014 overwintering season that the eastern monarch population has occupied less than one hectare. Read More

Western Monarch Count Declines

Jan 30, 2024

Categories

  • Community Science
  • MJV Partnership News
  • Population Trends
  • Important Monarch News

Over 400 volunteers surveyed 256 overwintering sites this winter, tallying a total of 233,394 monarch butterflies across the western overwintering sites. Read More

IUCN Changes Migratory Monarch Status from Endangered to Vulnerable

Dec 11, 2023

Categories

  • Community Science
  • Population Trends
  • Important Monarch News

The IUCN has changed the status of the migratory monarch. Learn about the reasons for this decision and the current status of the migratory monarch. Read More

Eastern Monarch Butterfly Population Decreases In the 2022-2023 Overwintering Season

Mar 21, 2023

Categories

  • Population Trends
  • Important Monarch News

Western Monarch Populations Increase for the Second Year, but Our Work is Not Done

Jan 31, 2023

Categories

  • Population Trends

Over 250 volunteers surveyed 272 overwintering sites this winter, tallying a total of 335,479 monarch butterflies observed across the western overwintering sites, an increase of 88,242 monarchs! Read More