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Monarch Joint Venture Blog

Eastern Monarch Numbers Increase, But Conservation Efforts Still Critical

Mar 06, 2025

Categories

  • Migration
  • Population Trends
  • Recent Research
  • Monarchs in Mexico

The eastern monarch butterfly population in Mexico’s oyamel fir forests this past winter occupied 1.79 hectares, according to the latest survey released by the World Wildlife Fund-Telmex Telcel Foundation Alliance (WWF) and the National Commission of Protected Natural Areas in Mexico (CONANP). This represents a 99% increase from last year’s 0.9 hectares in the 2023-2024 overwintering season. Read More

Western Monarch Population Continues to Decline

Jan 30, 2025

Categories

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

The 28th annual Western Monarch Count has reported a peak population of just 9,119 butterflies this winter. Read More

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