The invasive carpet sea squirt (filtsjöpung), known as “sea vomit,” is rapidly spreading across the seafloor in Kosterhavet National Park, smothering organisms beneath it. Authorities say budget cuts have hampered monitoring and control, but they are now examining ways to slow the outbreak.

Rats and droppings were found at Prästholmsskolan in Boden, Sweden; control measures are underway and the school says it acted immediately. The principal notes rodents have been sighted on the school grounds.

The Metlakatla Indian Community, which has been at the forefront in the effort to control the invaders, has trapped more than 40,000 of them this year.

North Yarmouth, Maine removed about 80 ash trees from Baston Park after an emerald ash borer infestation was detected. The wood will be processed by the Cumberland Wood Bank for local heating under state-advised precautions.

Mowi Canada East reports 166,262 farmed salmon died at two sites near Chaleur Bay on Newfoundland’s south coast, blaming repeated sea lice infestations intensified by warm surface waters, low freshwater runoff, and calm winds. The incident follows earlier 2025 mass mortalities linked to a thermocline inversion and warm, low-oxygen conditions.

An inspector from the Icelandic Fisheries Agency counted around 100 farmed salmon in the lower section of Haukadalsá, marking the largest occurrence of escaped farmed salmon in an Icelandic river, and plans are underway for removal operations including using anglers and Norwegian divers.

The Swedish government has ordered the eradication of invasive Asian stone martens around Sölvesborg and Bromölla, deploying hunters to eliminate the small, inbred population to prevent costly spread.

Alaska officials confirmed the state’s first detection of the small hive beetle at an apiary in the Copper River region, likely linked to imported bees from Mississippi. Experts warn the pest can damage bee colonies and honey, urging coordinated action by beekeepers to contain and eradicate it.

Salla’s Ruuhijärvi beach and rug‐washing area is closed through the weekend after a highly poisonous water hemlock was found on the shore, and will be removed by authorities.

Municipal gardener Grete Larsen in Hammerfest warns that invasive Alaska lupine is crowding out native vegetation and asks residents to help remove flowers and seed pods.

Tobique Valley High School in Plaster Rock, N.B., has been temporarily closed and its 134 students and 22 staff relocated to nearby schools after a persistent bat infestation.

A close look at this fallen spruce tree raises questions underlying causes and tree health.

The invasive orange hawkweed, known for its striking appearance, is rapidly spreading across Southeast Alaska, threatening local ecosystems by outcompeting native plants.

The past few decades have been the most significant for the damage the mice have caused, said Dr. Anton Wolfaardt, the Mouse-Free Marion project manager. He said their numbers have increased hugely, mainly due to rising temperatures from climate change, which has turned a cold, windswept island into a warmer, drier, more hospitable home.

Invasive elodea decade history in the Chena slough with mitigation and persistent infestation.

"This season we have observed many salmonberry bushes that appear to be defoliated. It seems something is eating the leaves. We have also noticed the berries look sickly."

Scientists with the U.S. Forest Service believe that the blackheaded budworm, whose numbers surged over the past three years, is now in decline.

Juneau, Alaska, is experiencing a persistent infestation of budworms that is causing significant defoliation, despite the outbreak tapering off in other regions.

Foam or saliva-looking substance on seen on flowering plants like fireweed and yarrow.

Elodea was first observed in Harding Lake in 2020 growing in isolated patches and has since been assessed and managed by the Fairbanks Soil and Water Conservation District and its partners.