“Alarming Decline: 22% of Butterflies Lost in 20 Years – What You Need to Know”

A groundbreaking new study has revealed alarming statistics about the decline of butterflies in the contiguous United States. Over the past 20 years, the country has lost 22 percent of its butterfly population, a trend that has researchers concerned about the future of these important insects.

The study, published in the journal Science, analyzed data from almost 77,000 surveys conducted between 2000 and 2020, totaling 12.6 million individual butterflies. The results showed that 33 percent of the 342 species studied experienced significant declines, while less than 3 percent showed increases. The American lady butterfly, for example, saw a 58 percent decrease, while the Hermes copper butterfly plummeted by 99.9 percent.

Experts attribute the decline in butterfly populations to a combination of factors, including habitat loss due to agriculture and development, climate change, and pesticide use. Neonicotinoids, a class of insecticides, have been particularly harmful to butterfly populations, with one study finding that even native milkweed plants used to support monarch caterpillars were contaminated with pesticides.

Climate change is also playing a role in the decline of butterflies, with North American species moving northward in search of more hospitable conditions as the world warms. The study found that northern populations of butterflies were faring better than southern populations in three-quarters of cases.

While the findings are concerning, researchers emphasize that solutions are available. Tackling climate change and regulating pesticides at the policy level are important steps, but individuals can also make a difference by creating habitat refuges for butterflies and other insects. Planting native flowers, shrubs, and trees can provide essential food and shelter for these important pollinators.

The study did not provide much information on the status of monarch butterflies, which have been recommended for federal protection due to staggering declines in their overwintering sites in Mexico and California. However, recent data from Mexico showed a significant rebound in overwintering monarch populations, attributed to improved environmental conditions along their migration route.

Overall, the study highlights the urgent need to address the threats facing butterfly populations in the United States. By taking action to protect these vital insects, we can help ensure a healthy ecosystem for future generations.