Monarch Joint Venture Blog
Eastern Monarch Butterfly Population Falls to Less than One Hectare in the 2023-2024 Overwintering Season
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
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
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
Western Monarch Populations Increase for the Second Year, but Our Work is Not Done
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