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Asclepias californica is an important monarch butterfly caterpillar host plant, and chrysalis habitat plant. The cardiac glycosides caterpillars ingest from the plant are retained in the butterfly, making it unpalatable to predators. [4] Asclepias californica attracts a wide variety of pollinators including bees and other butterfly species. Its ...
The habitat of the western population of monarch butterflies is protected from visitors and commercial activities on federal land. Plant collection, animal collection, and the disruption of habitat are not permitted. Federal lands do not possess policies or guidelines regarding the maintenance of trees on which the monarchs overwinter. [23]
Monarch butterflies are thought to respond to different cues that promote the fall season southern migration. These include the angle of light coming from the sun, the senescence of larval host milkweed plants, the decreasing day period and temperature drop. [21] The migration begins at the northernmost summer range approximately in August.
Western monarch numbers are vastly improved over the winter of 2020-21, when researchers counted less than 2,000 of the iconic pollinators overwintering along the Central and Southern California ...
Aurora Anaya dove headlong into California native plants for her home in Whittier. A bonus was a yard full of fragrance and endangered monarch butterflies.
The number of western monarch butterflies overwintering in California dropped by 30% last year, likely due to how wet it was, researchers said Tuesday. Volunteers who visited sites in California ...
Butterfly gardening is a way to create, improve, and maintain habitat for lepidopterans including butterflies, skippers, and moths. [2] Butterflies have four distinct life stages—egg, larva, chrysalis, and adult. In order to support and sustain butterfly populations, an ideal butterfly garden contains habitat for each life stage.
The U.S. Fish and Wildlife Service proposed listing the once-common monarch as threatened under the Endangered Species Act, and designating coastal California sites where the butterflies spend ...
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