MaryAnn Lepp has observed an increase in monarch butterflies undergoing their transformative process in her garden, with as many as 20 caterpillars feasting on her swamp milkweed in a single day this week. She is one of many Canadian monarch enthusiasts witnessing a surge in backyard milkweed patches flourishing due to favorable wet and hot conditions in parts of the Prairie this summer.
“This is chrysalis No. 2 … I’m so excited,” Lepp remarks, scanning her garden for monarch cocoons in La Broquerie, approximately 60 kilometers southeast of Winnipeg. She notes a higher presence of butterflies this year compared to previous years.
While conservation experts cannot definitively attribute the surge to weather conditions, they acknowledge the abundance of anecdotal reports of caterpillars, chrysalises, and monarch butterflies as a positive sign for the federally endangered species. Marika Olynyk, curator of the Living Prairie Museum, confirms the notable increase in monarch sightings in Winnipeg throughout the summer.
Monarch butterflies rely on milkweed flowers for nectar but are selective during the caterpillar stage, feeding exclusively on milkweed leaves. Despite efforts by individuals like Lepp to plant milkweed and native wildflowers, their availability is still limited due to habitat loss from the conversion of native grasslands to farmland.
Habitat loss remains the primary threat to monarchs, with the disappearance of vast tallgrass prairies across North America. The Committee on the Status of Endangered Wildlife in Canada designated monarchs as endangered in 2016, highlighting the urgent need for protection measures.
Monarch populations are closely monitored through wintering grounds in Mexico, with researchers estimating that the current population is only at 50% of sustainability. While there is increased awareness and conservation efforts, more work is required to ensure the species’ survival.
In addition to monarchs, other endangered butterflies like the Poweshiek skipperling face even greater odds of extinction. Efforts to breed and release Poweshiek skipperlings at the Assiniboine Park Zoo have shown promising signs of population recovery this summer.
As part of conservation initiatives, zoo staff will be fitting monarchs with radio transmitters this fall to track their migration south to Mexico. Enthusiasts like Epp remain dedicated to nurturing caterpillars and chrysalises, emphasizing the importance of preserving nature and fostering a harmonious relationship with the environment.
Overall, the increased presence of monarch butterflies in Canadian prairies this summer signals a positive trend for the endangered species, underscoring the importance of conservation efforts to protect their habitats and ensure their survival.