Endangered and Threatened Pollinators in Maine
Maine's native pollinators face unprecedented challenges. Learn about the species at risk and how we can help protect these vital members of our ecosystem.
Why This Matters
Pollinators are essential to Maine's ecosystems and agriculture. They pollinate wild plants, crops like blueberries and apples, and help maintain biodiversity. When pollinator populations decline, entire ecosystems suffer. Understanding which species are at risk is the first step toward protecting them.
Rusty patched bumblebee
Bombus affinis
Federal Endangered Status
Once common across the U.S., now critically endangered due to habitat loss, pesticides, and disease.
Southeastern blueberry bee
Habropoda laboriosa
State species of concern in Maine
Key pollinator of blueberries; habitat loss threatens their populations.
Yellow-banded bumblebee
Bombus terricola
Recognized as a species of concern in Maine
Declining due to habitat fragmentation, pesticides, and disease.
Northern bumblebee
Bombus bimaculatus
Listed as at risk in some regions; declining statewide
Sensitive to environmental change and pesticides.
Maine Cuckoo Bee
Parasitic bee species
Noted as at risk due to habitat loss affecting their host species
Relies on other native bumblebee species for survival.
Monarch butterfly
Danaus plexippus
Part of the U.S. population listed as Threatened in 2024
Declines due to loss of milkweed habitat, pesticides, and climate change.
Lasioglossum Sweat Bees
Various species
Several native sweat bee species are declining in Maine
Threatened by habitat destruction and pesticide use.
Willow and other native pollinating flies
Various native fly species
Some native fly species are in decline due to habitat changes
While not listed nationally, some native fly species are in decline due to habitat changes.
Additional Notes
Native bees and butterflies
Many species of native bees (other than bumblebees) and native butterflies in Maine are experiencing declines due to habitat loss, pesticide exposure, climate change, and disease.
Conservation efforts
Maine has ongoing programs to monitor these species, protect their habitats, and promote pollinator-friendly practices.
How You Can Help
Every action counts when it comes to protecting endangered pollinators. Here are practical steps you can take today.
Plant Native Flowers
Choose native Maine plants that provide nectar and pollen throughout the growing season. Avoid pesticides and herbicides.
Create Habitat
Leave areas of bare ground for ground-nesting bees. Provide brush piles and dead wood for cavity-nesting species.
Avoid Pesticides
Eliminate or minimize pesticide use. Even "bee-safe" products can harm sensitive species. Choose organic methods.
Support Conservation
Support organizations working to protect pollinators. Participate in citizen science projects and habitat restoration.
Educate Others
Share information about endangered pollinators with friends, family, and community members. Awareness is key.
With our Sponsorship Programs
Join our sponsorship programs to directly support pollinator conservation efforts. Your sponsorship helps fund habitat restoration, educational initiatives, and ongoing research to protect Maine's endangered pollinators.