Unseasonable weather pushed last month to the fifth warmest April on record worldwide, federal weather statistics show.

Nations are nowhere near being on track to avert significant climate change in the coming decades.

Agriculture Secretary Tom Vilsack today announced the U.S. Forest Service will dedicate $40.6 million for 27 exceptional land acquisition projects in 15 states that will help safeguard clean water, provide recreational access, preserve wildlife habitat, enhance scenic vistas and protect historic and wilderness areas.

Today's mega forest fires of the southwestern U.S. are truly unusual and exceptional in the long-term record, suggests a new study that examined hundreds of years of ancient tree ring and fire data from two distinct climate periods.

Forest health experts say unseasonably warm weather across Wisconsin is raising concerns that oak wilt, a serious and almost always fatal fungal disease of red oaks, will likely appear sooner than normal and encourage landowners to stop pruning oaks from now through the end of July.

USDA’s Animal and Plant Health Inspection Service has dedicated April as Invasive Plant Pest and Disease Awareness Month.

Loss of biodiversity appears to affect ecosystems as much as climate change, pollution and other major forms of environmental stress, according to results of a new study by an international research team.

In testimony on Capitol Hill, U.S. Forest Service Chief Tom Tidwell emphasized the importance of collaboration in developing restoration projects on national forests and grasslands.

Scientists at the University of Guelph have found a way to successfully clone American elm trees that have survived repeated epidemics of their biggest killer -- Dutch elm disease.

If people aren’t careful, chowing down on invasive animals and plants could lead to some unpleasant surprises.

U.S. temperatures for April third warmest on record; past 12 months and first third of the year were warmest nation has experienced.

The Minnesota Department of Agriculture is partnering with Working Dogs for Conservation to train dogs to sniff out emerald ash borer larvae and ash tree material.

Don't let its common name fool you: The "kudzu bug" isn't to be trusted.

It might not be an exact science, but there are a few surefire hints the experts use to figure out if your tree might be ready to drop a limb.

In all, 56 percent of the Lower 48 states were experiencing drought conditions as of May 8, almost twice the area compared to last year at this time, according to data from the U.S. Drought Monitor.

Wildfires are reported in several states along the eastern seaboard.

Researchers from the Forest Service — in concert with National Park Service officials and other scientists — are working to steel high-elevation pine forests in the West against the onslaught of climate change.

If you plan to move this year, please don’t make a move until you check for the gypsy moth.

The keys to managing bark beetles are maintaining a diversity of healthy, site-adapted tree species and adequate spacing between host trees.

Old swaths of Appalachian forest land left barren by decades of coal mining may find their past is their future, if efforts to restore the American chestnut tree in reclaimed coal fields are successful.

The “winter that wasn’t” is going out the way it came in - with a poorly timed, damaging snowfall event, the likes of which would have been much more welcomed during the actual winter months.

Research by Southern Research Station scientists shows that the impacts of recent outbreaks of southern pine beetle further degraded shortleaf pine-hardwood forest ecosystems in the southern Appalachian region.

Plants are leafing out and flowering sooner each year than predicted by results from controlled environmental warming experiments, according to data from a major new archive of historical observations assembled with the help of a NASA researcher.

Global warming has caused more rain to get dumped on rainy parts of the world and dry regions to dry up even more, according to a Science study.

Imagining our communities without trees is hard to fathom. Unfortunately, there is an insect that threatens the trees we love – the Asian longhorned beetle.

Last year's hurricanes and flooding not only engulfed homes and carried away roads and bridges in hard-hit areas of the country, it dispersed aggressive invasive species as well.

National results indicate that tree cover in urban areas of the United States is declining at a rate of about 4 million trees per year, according to a U.S. Forest Service study published recently in Urban Forestry & Urban Greening.

Much of the U.S. can expect a summer with temperatures above average and significant wildfire potential, government forecasters warned.

For decades, they have been the biggest sources of uncertainty in forecasts of future climate. But researchers say they are beginning to turn a corner in simulating clouds and aerosols.

Agriculture Secretary Tom Vilsack and Interior Secretary Ken Salazar outlined the federal government's readiness for the wildland fire season to ensure protection for communities and restoration of forests and public lands across the country.

Purple traps help State and Federal officials to uncover signs of the invasive, tree-killing emerald ash borer beetle.

Almost 70 percent of the most damaging non-native forest insects and diseases currently afflicting U.S. forests arrived via imported live plants.

Earth’s ecosystems keep soaking up more carbon as greenhouse gases accumulate in the atmosphere, new measurements find.

A tree-killing invasive insect recently crossed its last major natural eastward obstacle, the Hudson River in New York, and it is now poised to reach New England woodlands.

New USGS modeling studies project changes in water availability due to climate change at the local level.

While the East has been dealing with a powerful Nor’easter that dumped several inches of windswept rain along the coast, and up to 2 feet of snow in the interior, the West has been baking in record heat.

The U.S. Forest Service and APHIS PPQ have updated the survey guidelines for Thousand Cankers Disease to include instructions for how to use the lure developed for the walnut twig beetle.

Most of the Southwest as well as parts of California and the Southeast can expect drought conditions to worsen through July, federal forecasters said.

City streets can be mean, but somewhere near Brooklyn, a tree grows far better than its country cousins, due to chronically elevated city heat levels, says a new study.

Raging wildfires are burning tens of thousands of of acres in Arizona, Nevada and parts of New Mexico and Colorado. But federal agencies overseeing the response say they're not worried — by this time last year, there had already been more fires that destroyed more acres.

The Michigan Department of Agriculture and Rural Development confirmed an infestation of the hemlock woolly adelgid in Berrien County.

The USDA Forest Service's Eastern Forest and Western Wildland Environmental Threat Assessment Centers recently unveiled a product that helps natural resource managers rapidly detect, identify, and respond to unexpected changes in the nation's forests by using web-based tools.

A safe haven could be out of reach for 9 percent of the Western Hemisphere's mammals, and as much as 40 percent in certain regions, because the animals just won't move swiftly enough to outpace climate change.

Winter Moth is an introduced pest that has been well established in eastern Massachusetts and Rhode Island for about 10 years.

For the first time, researchers have been able to build a consensus between different regional climate models using spatial statistics.

A tree-killing invasive insect, the hemlock woolly adelgid, was found for the first time in Indiana on a landscape tree in LaPorte County in mid-April.