MaryAnn Lepp has noticed a significant increase in monarch butterflies undergoing their transformative journey in her garden. She observed 20 caterpillars feeding on her swamp milkweed within a single day this week. This surge in monarch activity is being witnessed by numerous Canadian enthusiasts, with backyard milkweed patches thriving under the wet and hot conditions prevalent in parts of the Prairie this summer.
Expressing her excitement, Lepp shared her joy at finding a second chrysalis in her garden in La Broquerie, located about 60 kilometers southeast of Winnipeg. She noted an abundance of butterflies this year compared to previous years.
While experts cannot definitively attribute the surge to favorable weather conditions, they acknowledge the positive implications for the federally endangered monarch species. Reports of caterpillars, chrysalises, and monarch butterflies flooding social media platforms like Manitoba Monarch Mission are seen as promising signs for the species.
Marika Olynyk, curator of the Living Prairie Museum, highlighted the abundance of monarchs in Winnipeg this year, emphasizing consistent sightings of caterpillars, chrysalises, and butterflies throughout the summer.
Monarch butterflies primarily rely on milkweed for sustenance, although they also feed on various flowering plants. However, during the caterpillar stage, monarchs are selective eaters, consuming only milkweed leaves.
Despite efforts by individuals like Lepp to plant milkweed and native wildflowers, these resources remain scarce due to historical habitat loss caused by the conversion of native grasslands to farmland. Habitat loss poses the most significant threat to monarch populations, with the disappearance of Tallgrass Prairie habitats across North America reflecting the broader issue of species and habitat loss.
In response to mounting concerns, the Committee on the Status of Endangered Wildlife in Canada officially classified monarchs as endangered in 2016. The federal government followed suit in December 2023, making it illegal to harm or capture monarchs on federal lands at any stage of development.
Monarch populations are closely monitored through the annual assessment of forest wintering grounds in Mexico. While conservation efforts and public awareness have increased, the sustainable monarch population remains below optimal levels, underscoring the ongoing challenges faced by the species.
In addition to monarchs, the native prairie garden at the Assiniboine Park Zoo has witnessed a rise in populations of the critically endangered Poweshiek skipperling butterfly. This lesser-known species, on the brink of extinction, is exclusively found in a small native grassland patch in southeastern Manitoba.
Efforts to breed and release Poweshiek skipperlings at the zoo have shown some positive outcomes this summer, offering hope for the species’ recovery. The favorable weather conditions this year are believed to have benefitted not only monarchs and Poweshiek skipperlings but also other butterfly species.
Looking ahead, the zoo plans to assist monarchs by attaching radio transmitters to track their migration to Mexico. Enthusiasts like Epp remain dedicated to nurturing caterpillars and chrysalises, emphasizing the importance of conservation efforts in preserving biodiversity and fostering a connection with nature.
