Take Down That Dam: River Ecosystems Bounce Back As Removals Soar
In rivers big and small, migratory fish surge back to life as old energy structures are taken down.
Controlling Mosquito Populations by Releasing Mosquitoes
Los Angeles County officials are hoping to replicate a successful pilot program that mated sterile male mosquitoes with biting females, leading to a reduction in the overall population.
When a Cougar Comes to Town
There have been reports of a big cat lurking in Washington’s capital city. A state agency is looking into the sightings.
This State Official Would Like You to Mail Her Your Ticks
Patti Casey, an environmental surveillance program manager for the state of Vermont, oversees three tick-monitoring programs, including one where she collects ticks by mail from residents.
Some Fish Are Still Full of Mercury, for a Worrying Reason
Emissions of mercury have declined, but levels in fish could still increase thanks to overfishing and a changing climate.
Black Bears Adapt to Life Near Humans By Burning the Midnight Oil
COMMENTARY | Some animal populations are growing. An estimated 1 million black bears now roam from Mexico to Canada and Alaska.
Invasive Grass Increases Wildfire Threat in Western States
Land managers are grappling with cheatgrass, a weed that has invaded millions of acres.
$831 Million Project to Repel Invasive Fish From Great Lakes Gets Army Corps Greenlight
One advocate describes a “race against time” to block Asian carp, which pose a threat to native wildlife.
Sniff, Sit, Play: Using Dogs to Detect Invasive Species
Puddles, a 2-year-old Jack Russell mix, is helping Fish and Wildlife officials in Washington state prevent the spread of invasive species of mussels.
Planned Burns Can Reduce Wildfire Risks, But Expanding Use of ‘Good Fire’ Isn’t Easy
COMMENTARY | Forests across much of North America need fire to maintain healthy structures and watershed conditions and support biodiversity.
The Tiny Poisonous Toads Taking Over Florida Yards
“It was like a mass exodus of toads.”
State Lawmakers Urge Feds to Deny Grazing Permit for Bison
Some Montana lawmakers oppose "free-roaming" bison, fearing disease and destruction. Proponents say that fear is misguided.
Climate Change Enters Its Blood-Sucking Phase
As winters grow warmer in North America, thirsty ticks are on the move.
Invasive Species Have Some States Seeking Increased Federal Partnership
More than 5,000 invasive species—from plants like cheatgrass to rodents like nutria—inhabit the U.S. causing about $120 billion in economic damage annually.
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