Moving into April

March 31, 2021- In Mexico, the remaining colony of monarchs in La Salud has finally departed. Farther north, the leading edge of migration is slowly advancing, and reports of eggs, larvae and milkweed are picking up. And out West, Gail Morris provides an update on monarch activity in California and Arizona.

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Monarch Migration Gaining Momentum

March 24, 2021- Spring Migration has begun.

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Less Monarch butterfly presence and increased degradation in its hibernation forests

March 9, 2021- Monarch presence in Mexico’s hibernation sanctuaries decreased by 26%.

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Overwintering Monarchs

Dec 16, 2020- Ellen Sharp provides an update from Cerro Pelon Monarch Butterfly Sanctuary in Mexico. Plus, a reminder to monitor overwintering monarchs in the Southeastern U.S. And Dr. Karen Oberhauser, director of the UW–Madison Arboretum, shares her thoughts on the recent monarch listing decision.

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Monarch Butterfly Endangered Species Act Listing Decision Announced

Dec 15, 2020- U.S. Fish and Wildlife Service Finds Endangered Species Act Listing for Monarch Butterfly Warranted but Precluded

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Numbers Rising in Mexico

Nov 4, 2020- Estela Romero and Ellen Sharp provide updates from monarch sanctuaries in Mexico. Farther north in the US, many monarchs remain on their journey. Out west, Gail Morris reports on the final leg of migration.

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First Arrivals Within the Biosphere Reserve!

Oct 28, 2020- Monarchs were observed in Cerro Pelon Sanctuary on October 23, and Estela Romero reports on arrivals near the Sierra Chincua and El Rosario Sanctuaries.

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Early Arrivals in Mexico

Sept 30, 2020- Migratory monarchs were reported in Mexico, and activity remains high along the central flyway and is building along the eastern flyway.

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Sightings Flowing in

Sept 16, 2020- Fall begins next week and migration is well underway as reports of flying, nectaring, roosting, and late season breeding continue to come in.

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Gardeners restore pollinator habitat

Aug 27, 2020- Monarch butterflies are vital pollinators that have been dying out due to a loss of habitat and harsh weather conditions. But families, clubs, and other volunteers can bring portions of the habitat back to life with nectar-rich plants like milkweed.

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Fall Migration Season is Here!

Aug 18, 2020- Monarch activity is ramping up as preparations for fall migration begin. Get ready and share your observations!

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New study indicates a 53% decrease in area occupied by monarch butterflies

March 13, 2020- In the 2019-2020 wintering season, the area of forest occupied by monarch butterflies was 7 acres, down from 15 acres in the 2018 – 2019 season.

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Monarch butterflies: Signs point to a banner year for 2019

Feb 1, 2019- It’s early yet, but initial signs point to a banner year, butterfly-wise. Monarch butterflies overwinter in Mexico, and three groups tracking them report a significant increase.

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Early Thanksgiving Counts Show a Critically Low Monarch Population in California

Nov 29, 2018- 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.

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Monarch butterflies are migrating in record numbers, but they are still at risk

Nov 2, 2018- 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.

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