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导向器; 导星望远镜

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  • Monarch (Danaus plexippus) | U. S. Fish Wildlife Service
    Monarch butterflies are pollinators that are well known for their impressive long-distance migration and their recent declines The species highlights the need for conservation efforts for all pollinators across the nation Learn more about monarch conservation efforts, including what the U S Fish and Wildlife Service is doing and how you can help With its iconic orange and black markings
  • Monarch Watch
    In 2021, the International Union for the Conservation of Nature (IUCN), an international environmental network, added the monarch butterfly to the Red List of Threatened Species as "endangered," which was later changed to "vulnerable" in 2023
  • North American Monarch Protections and Listing Status
    This webpage provides an overview of the legal protections and conservation status of monarch butterflies in Canada, the United States, and Mexico
  • Monarch Butterfly Survival Depends on More than Milkweed
    Four healthy monarch butterfly pupae (chrysalises) hanging from mesh fabric in an enclosure in a shaded plot NPS Michelle Boone The data led to some surprising observations There were more than twice as many monarch eggs and caterpillars, on average, on shaded milkweed plants than on those in open, sunny areas
  • Why Are Monarch Butterflies Endangered: Key Threats
    Monarch butterflies are endangered primarily because of massive habitat loss, pesticide use, and climate change The migratory monarch was officially classified as Endangered on the IUCN Red List in 2022, after its population shrank by an estimated 22% to 72% over the prior decade
  • Monarch butterfly population increases 64% - World Wildlife Fund
    On the eve of spring, the eastern migratory monarch butterfly shows promising signs of recovery Two new reports, both released by WWF-Mexico and its partners, estimate a 64% increase in species population and a significant decrease in forest degradation within their critical winter habitat
  • Inaction Threatens Already Imperiled Monarch Butterfly Populations
    The U S Fish and Wildlife Service missing the deadline to list the monarch butterfly as threatened under the Endangered Species Act further imperils a species already facing precipitous decline
  • Communities building the future of the monarch butterfly
    The migratory monarch butterfly is Vulnerable on The IUCN Red List of Threatened Species™, and considered to be at risk of extinction While seasonal changes in the expression of certain genes help activate the migratory state, the butterflies' ability to orient themselves and remain on-course is based on a solar compass regulated by biological clocks in their antennae
  • On the Brink: Why Monarch Butterflies Need Endangered Species Act . . .
    Monarch butterflies are facing rapid decline Learn why Endangered Species Act protection is urgently needed, and how you can take action to help save them
  • Community Conservation Thrives as Monarch Butterfly ESA Listing Faces . . .
    The recent decision by federal authorities to delay the listing of the monarch butterfly under the Endangered Species Act (ESA) has raised concerns among conservationists and environmental advocates Despite this setback, a wave of grassroots initiatives and community-based conservation efforts is





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