Maine Wildlife Alert: The Dangerous Pests You Need to Watch Out For Right Now

From the "ghost moose" of the North Woods to new invasive thrips in our greenhouses, here is what is on the move in the Pine Tree State this month.

1. The 2026 Tick Surge: A Record-Breaking Start

Maine health officials are on high alert as of April 21, 2026. Despite a "rollercoaster" spring with scattered snow, the Maine CDC has already reported over 360 cases of Lyme disease this year—a concerning number for so early in the season.

• The Nymph Warning: Experts from the tick lab report that nymphal deer ticks may have a higher infection rate this year. These "poppy seed" sized ticks are responsible for the majority of human infections because they are nearly impossible to see.
• The "Ghost Moose" Crisis: In the North Woods and Northeast Kingdom, the Winter Tick is currently devastating the moose population. You may see moose with large white patches where they have rubbed off their fur to escape the thousands of ticks attached to them.
• Action: Treat your hiking gear with permethrin. If you see a "lethargic" or patchy moose, keep your distance and report the sighting to the Department of Inland Fisheries and Wildlife (IFW).

2. Black Bears: The April 1st "Wake-Up."

Maine is home to the largest black bear population in the Eastern U.S., and as of April 1, 2026, they are officially active. With natural food sources still buried under spring mud, bears are heading straight for residential backyards.

• The Conflict: Hungry bears are currently targeting bird feeders, grills, and pet food left outdoors.
• The Rule: Take down bird feeders immediately. Secure your trash in a garage or bear-proof container. Maine IFW emphasizes that "a fed bear is a dead bear"—once they lose their fear of humans, they often have to be euthanized for public safety.
• Safety Tip: If you encounter a bear in your yard, make yourself look large, shout "Hey bear," and back away slowly. Please don't run.

3. Emerald Ash Borer: The Three-County Expansion

The Maine Forest Service provided a major update in February 2026, confirming that the Emerald Ash Borer (EAB) has officially migrated into three new counties: Somerset, Waldo, and Hancock.

• The Threat: This metallic green beetle is an "economic and cultural assassin," targeting the brown ash used for traditional Wabanaki basket weaving and white ash used for timber.
• The Biological War: This month, the state is finalizing plans to release parasitoid wasps (stingless, tiny insects that eat only EAB larvae) at new suitable release sites.
• Action: To protect the remaining healthy forests in Northern Maine, do not move firewood. You can buy it where you burn it.

4. Spotted Lanternfly: The "Hitchhiker" Watch

While there are still no established infestations in Maine as of April 2026, state horticulture experts are on high alert. Last summer saw a spike in sightings along the I-95 corridor from Gray to Lewiston.

• Current Status: We are in the final weeks of the egg mass stage. These look like small, gray, mud-like smears on the sides of vehicles, trailers, and outdoor gear.
• Action: If you have recently traveled to Massachusetts, New Hampshire, or New York, inspect your vehicle's wheel wells. If you see "mud patches," scrape them into a bag of rubbing alcohol and report it to This email address is being protected from spambots. You need JavaScript enabled to view it..

5. Thrips parvispinus: The Greenhouse Threat

A brand-new alert was issued in April 2026 regarding a tropical pest that has arrived in Maine greenhouses via out-of-state plant shipments.

• The Pest: Thrips parvispinus is a tiny insect that hides in plant buds and under leaves, causing severe damage to ornamental plants and peppers.
• The Danger: While they likely won't survive a Maine winter outdoors, they can devastate greenhouses and be repeatedly reintroduced during the spring growing season.
• Detection: Tap your new plants over a white sheet of paper. If tiny, dark insects fall out, you can contact your local nursery or the Department of Agriculture.

Summary Checklist for Maine Residents

1. Bird Feeders Down: Avoid attracting Maine's 35,000+ bears to your porch.
2. Tick Checks: Perform a full-body scan every night; the 2026 infection rate is trending high.
3. Firewood Rule: Keep firewood local to prevent the Emerald Ash Borer from reaching the North Woods.
4. Inspect Shipments: Check any new spring plants for "suspicious bugs" before adding them to your garden.