LEO Network

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The LEO Network is a worldwide network of observers and experts that share their observations of environmental change.
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Observations

Moth population takes flight in North Vancouver
The North Shore is discovering what life is like under moth rule. Eclipses of moths have been flitting, fluttering and generally wreaking havoc around any light source over the past week.
Lynn Canyon, British Columbia, Canada
North Shore News

Mass "Ballooning" Spider Event Responsible for Unusual Webs on Vegetation
Unusual webs spread across vegetation is likely related to a mass ballooning event, where spiders launched themselves in the air using the Earths magnetic charge and the wind.
St. Paul Island, Alaska, United States

Detectan presencia del 'Pez Diablo' en Sinaloa; una amenaza para la pesca y los ecosistemas
They detect the presence of the 'Devil Fish' in Sinaloa; a threat to fishing and ecosystems
Culiacán, Sinaloa, Mexico
News

Wasilla store contends with ‘large-scale’ rodent problem
Fred Meyer is employing an aggressive pest-control plan after customers spotted mice in the store through Southcentral Alaska’s unusually warm summer.
Wasilla, Alaska, United States
Anchorage Daily News

Late Birch Leaf Edge Miner Damage
Browning on birch leaves before time for the fall season transition.
Lazy Mountain, Alaska, United States

Spruce Bark Beetle and Wood Boring Insects
"The spruce bark beetle epidemic currently ravaging Southcentral AK's spruce trees is well-known, but I haven't heard mention of other pests occurring in conjunction."
Lazy Mountain, Alaska, United States

Grasshopper invasion of Las Vegas may last weeks
An unusually wet year is responsible for the biblical-seeming swarm of pallid-winged grasshoppers, according to entomologists.
Las Vegas, Nevada, United States
New York Times

Unusual Rusty Tussock Caterpillar (Orgyia antiqua)
"This is the first time I've seen this kind of caterpillar in this area."
Toksook Bay, Alaska, United States

Rusty tussock moths invade Seward Peninsula
The rusty tussock moth has invaded the tundra in the Nome area, an infestation of the species not seen this far north before.
Nome, Alaska, United States
The Nome Nugget

Invasive poison hemlock a growing concern on Vancouver Island
The Capital Regional District recently issued an alert sheet for Poison Hemlock (Conium maculatum).
Capital Regional District, British Columbia, Canada
Vancouver Island

Rusty Tussock Moth (Orgyia antiqua) Caterpillars in Nome
Unusually high abundance of rusty tussock moth caterpillars in the Nome area.
Nome, Alaska, United States
Elizabeth Graham, Jessie Moan, Robin Mulvey, Tammy Davis, John Lundquist, John Lundquist

Dead Ash Trees Across Western New York State
Churchville, New York, United States

Trees Devastated by Spruce Bark Beetles (Dendroctonus rufipennis)
"My family and I have been RV camping across Alaska for the last several years. This year, the mass amounts of dead spruce trees have been more apparent than any year prior."
Chase, Alaska, United States
Adrienne Fleek, Desirae Mack, Tricia Wurtz

Insects feast on willows after unusually warm, dry spring
The willow blotch leaf miner appears to be having a banner year in Whitehorse, likely because of hot, dry conditions in the city this spring.
Whitehorse, Yukon, Canada
CBC

Northern B.C. lake closed to fishing due to infestation of invasive goldfish
Goldfish compete with native fish for food, potentially threatening an ecosystem.
Lost Lake, British Columbia, Canada
Global News

Invasive elodea prompts closure of Susitna Valley lakes
Elodea was discovered in Alexander Lake in 2014 by researchers checking minnow traps. At the time, it covered 20 percent of the lake but now has spread to 90 percent.
Willow, Alaska, United States
Alaska Journal of Commerce

Sea Lice Plagues Return and Threat to Wild Salmon Increases
Major sea lice epidemics have erupted on Atlantic salmon fish farms on Vancouver Island’s west coast over the last three months, according to industry, Fisheries and Oceans Canada and independent reports.
Clayquot Sound, British Columbia, Canada
The Tyee

Southcentral Alaska’s spruce bark beetle infestation is spreading in Anchorage. There’s only one defense.
The worst-hit areas appear to be established neighborhoods with older spruce trees, especially in Turnagain and Spenard.
Anchorage, Alaska, United States
Anchorage Daily News

Rat infestation plagues Toronto neighbourhood
Her right hand protected by an old plastic bag, Donna Devlin carefully reaches into a shallow sewer basin in her driveway, and drags out a dead rat the size of her forearm. It's the latest casualty in a war that Devlin and her neighbours say they've been fighting, on and off, for two decades.
Toronto, Ontario, Canada
CBC

Increasing Impact of European Elm Scale (Eriococcus spurius) in Calgary’s Urban Forest
Calgary, Alberta, Canada

Increase of Invasive Species Locally
Construction of flood control berms in the city of Medicine Hat appears to have facilitated the proliferation of invasive flora in the city.
Medicine Hat Alberta

Roundheaded Wood Borer

The changing nature of Canada's forest supply as fires, bugs, and climate bite
Mills in the heart of Canada's timber industry have fallen quieter this winter as wildfires and infestations made worse by climate change have made vast tracts of once valuable forest into barren stands of dead trees.
Fraser Lake, British Columbia, Canada
Alaska Highway News

Ecological collapse of Toronto's ravine system has begun, researcher says
Ravines in Toronto, Ontario, Canada
CBC News

Pine Beetle in Jasper National Park
Patricia Lake, Alberta, Canada

Flying Ants Invade Moscow
While the airborne ants may be a nuisance, Moscow City Hall’s environmental protection department said they are not dangerous.
Moscow, Moscow, Russia
The Moscow Times

Mountain pine beetle takes over Jasper National Park forests
The iconic pine trees blanketing Jasper National Park may never be the same as a mountain pine beetle epidemic has infected nearly half of the park's pine forest.
Jasper National Park, Alberta, Canada
Edmonton Journal

Caterpillar Infestation
Caterpillar infestation in Village
Holy Cross, Alaska, United States

Bullfrogs threaten B.C. ecosystems
While their kin are declining worldwide, Canada’s largest amphibian, the bullfrog, is multiplying out of control in British Columbia — with some human help
Southwestern British Columbia
Canadian Geographic

Thousands of Spongy moth caterpillars (Lymantria dispar dispar)
For a decade, Fenwick, Ontario faced severe defoliation by invasive spongy moths, despite aerial bacterial treatments reducing their numbers.
Fenwick, Ontario, Canada

Tent Caterpillar Infestation
At one point our entire red brick house was covered in the black caterpillars trying to reach the adjacent forest. The silk web-like nests began to appear on our trees in May and within weeks, the forests foliage was decimated.
Woodford, Ontario

Spruce beetles’ expansion into Denali National Park poses questions about forest changes
The aggressive infestation that took hold in the Matanuska-Susitna Borough north of Anchorage in 2016 has now spread north, covering hillsides in the communities outside the park with rustred dead trees and reaching into park boundaries.
Cantwell, Alaska, United States

Red Lily Beetle (Lilioceris lilii) settles in Edmonton, Alberta
Edmonton, Alberta, Canada

Seeing brown birch leaves? It’s not necessarily a sign of fall. Blame leaf-munching larvae
The birch leafminer ate its way through birches across Southcentral and Interior Alaska this summer. Hot and dry weather earlier in summer may have been optimal for them.
Anchorage, Alaska, United States
Anchorage Daily News

Shellfish growers in Northwest’s oyster capital want ‘blitz’ against invasive green crabs
Shellfish growers in Willapa Bay in southwest Washington, the self-styled "Oyster Capital of the World," are alarmed by an invasion of potentially destructive nonnative European green crabs. Some are asking for an all-out trapping offensive to corral the invasive species.
Ocean Park, Washington, United States
opb

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