Stories by Patty Wetli

The Cherry Blossom trees in Jackson Park won’t reach peak bloom this year, the Chicago Park District said.

Stephen Colbert, host of CBS’s “Late Show,” announced Wednesday night he’ll be broadcasting live from Chicago during the convention, Aug. 19-22.

Spring migration is still weeks away from reaching its peak in Chicago and already the tiny body bags are piling up, filled with birds killed in collisions with the city’s glass buildings.

For the first time in its 90-year history, Brookfield Zoo Chicago will welcome koalas.

Sharp-eyed observers have now confirmed hatchlings in three of the four bald eagle nests being monitored on Will County forest preserve property.

Lights will be out in parking lots and along portions of the lakefront bike and pedestrian trails from 7 p.m. Friday to 8 p.m. Sunday.

Alliance for the Great Lakes has collected 20 years’ worth of data from beach cleanups. Tiny plastic trash is a huge problem.

Chicago’s water has been tested numerous times for the presence of so-called “forever chemicals,” and the substances have never been detected.

Wildlife officials are reporting that the season’s first Great Lakes piping plover, known as YibBee, has returned to his breeding grounds at Sleeping Bear Dunes. Will arrivals in Chicago be far behind?

Instead of trashing those vital eclipse glasses, recycle them at any one of dozens of Chicago locations.

“Chicago owns the most outfalls that discharge into the river system, and controlling what comes out of them is essential to reach our shared vision for a fishable-swimmable river that is accessible to everyone,” said Margaret Frisbie, executive director of Friends of the Chicago River.

The Illinois Department of Transportation learned a lot from the traffic jam “hangover” that followed 2017’s solar eclipse: mainly to warn motorists to expect gridlock.

An independent engineering study has concluded Promontory Point’s limestone blocks are still functioning as ample shoreline protection, which refutes a longstanding position held by the Army Corps of Engineers.

Challenger Sharon Waller has bested incumbent Daniel “Pogo” Pogorzelski in the Democratic race to claim a seat on the Metropolitan Water Reclamation District’s board of commissioners, according to unofficial results from the Chicago Board of Elections released Tuesday evening.

The Great American Eclipse is almost here. Here’s how to make the most of the experience in Illinois and the Chicago area.

The 29-year-old gorilla was diagnosed with congestive cardiac failure in early March and after an “abrupt decline” in her condition, “the difficult decision was made to euthanize her,” zoo officials said.

The rescued otter pup, now nearly 6 months old, was named in honor of his Alaskan roots.

In mid-April, the Chicago Department of Planning and Development is set to release an update to the city’s sustainable development policy. No section of the policy will make bird-friendly design mandatory.

CRTI connects organizations — public and private — across the seven-county Chicago area to promote the importance of trees and improve the quality of the region's tree canopy.

For the first time in at least six months, Chicago recorded zero weekend homicides due to gun violence, according to police.

Challenger Sharon Waller holds a slight lead over incumbent Daniel “Pogo” Pogorzelski in the race to claim a seat on the Metropolitan Water Reclamation District’s board of commissioners, with more than 100,000 outstanding vote-by-mail ballots still uncounted.

The Conservation Fund, Illinois Audubon Society and Openlands announced the purchase of the 985-acre Tamarack Farms, which will now become the single largest property within McHenry County’s Hackmatack National Wildlife Refuge.

The initial turnout tally was at just 20.2% of the nearly 1.7 million registered voters — including early voting and vote-by-mail ballots.

Though lauded as “groundbreaking” by the Park District, the playground has met with significant opposition from neighbors, who have faulted the choice of the Plaisance's east end as too dangerous for a play space.

On Wednesday, the Chicago Park District Board of Commissioners approved an admission fee increase that will take effect April 1.

Young trees could be vulnerable to damage from the emergence of millions of periodical cicadas in Illinois this spring. Here are tips on how to protect your trees.