MaryAnn Lepp observed a significant increase in monarch butterflies undergoing metamorphosis in her garden, with 20 caterpillars feeding on her swamp milkweed in a single day. This surge in backyard milkweed patches is being witnessed by numerous Canadian monarch enthusiasts due to the favorable wet and hot conditions in parts of the Prairie this summer.
The surge in caterpillars, chrysalises, and monarch butterflies has been a cause for excitement among butterfly enthusiasts, who are documenting the phenomenon on social media platforms like the Manitoba Monarch Mission group. While conservation experts cannot definitively attribute the surge to weather conditions, the increase in monarch activity bodes well for the federally endangered species known for their annual migration between Canada and Mexico.
Marika Olynyk, curator of the Living Prairie Museum, noted a substantial increase in monarch sightings in Winnipeg this year, with a consistent presence of caterpillars, chrysalises, and butterflies throughout the summer. Monarchs rely on milkweed plants for their survival, as they feed on milkweed leaves exclusively during the caterpillar stage.
Despite efforts by individuals like Lepp to plant milkweed and native wildflowers, these essential plants are still not as abundant as they once were due to habitat loss resulting from the conversion of native grasslands into farmland. Habitat loss remains the greatest threat to monarch butterflies, as the disappearance of tallgrass prairies has significantly impacted their population.
In response to the declining monarch population, the federal government upgraded the legal threat level for monarchs to “endangered” in 2016. Efforts to protect the species include prohibiting the harm or capture of monarchs at any stage of development on federal lands. Researchers rely on monitoring the monarch population in the forest wintering grounds in Mexico to estimate their numbers, with ongoing concerns about the species’ sustainability.
In addition to monarch butterflies, the native prairie garden at the Assiniboine Park Zoo has seen an increase in monarch numbers, as well as efforts to conserve the critically endangered Poweshiek skipperling butterfly. The zoo’s breeding and release programs aim to bolster the Poweshiek skipperling population, with promising signs of progress this summer.
As monarch butterflies prepare for their migration south to Mexico, conservationists are exploring innovative methods such as attaching radio transmitters to track their journey. Enthusiasts like Lepp are dedicated to safeguarding caterpillars and chrysalises under their care, emphasizing the importance of conservation efforts in preserving biodiversity and fostering a harmonious relationship with nature.