A mystery vandal is once again undoing ecological restoration work at LaBagh Woods.

It's time for the annual City Nature Challenge, a friendly global competition among hundreds of cities, running from Friday through Monday. Here's how to submit nature observations and boost Chicago in the standings.

There’s a love triangle brewing at Montrose Beach, where Imani the piping plover has been joined by a mystery bachelor and … a female.

Chicago’s birders are celebrating the arrival of Imani at Montrose Beach. The piping plover is a 2021 chick of Monty and Rose.

A small number of people had to leave their homes in Wisconsin as the river kept rising. Others stacked sandbags in the small community of Buffalo, Iowa, in anticipation of flooding this weekend and early next week.

More than 20 years after residents began their fight to save the stair-step limestone wall at Promontory Point on the south lakefront, the Point was declared an official Chicago Landmark during Wednesday’s City Council meeting.

Crews are scheduled to begin removal of the ancient bur oak on May 1. The zoo is planning Arbor Day events on April 28 to give the tree a celebratory farewell.

Known as one of the oldest-recorded meteor showers, the Lyrids are expected to produce 10 to 15 meteors per hour for three nights centered around its peak of 8:06 p.m. CST on Saturday, according to EarthSky.

The CHARM Center, as it’s been dubbed, will open Saturday in South Holland. The free, permanent recycling hub will accept items including electronics, textiles and Styrofoam, many of which are reusable.

Peak bloom is still a couple weeks away, but the buds are beginning to burst forth in Jackson Park’s Cherry Blossom Grove.

A new short documentary, “Watershed Warriors,” focuses on Friends of the Fox River and the progress the organization has made to reclaim the waterway as a natural resource for the people, wildlife and plants that live within its watershed.

According to a new survey, there’s been a shift in the percentage of Americans who believe humans are the primary driver of climate change as opposed to natural changes in the environment.

In true springtime-in-Chicago fashion, last week’s record-setting summer-like temperatures gave way to a return on winter Monday, as people woke up to snow-covered cars and below-freezing wind chills.

After months of great eggs-pectations, the Forest Preserve District of Will County has announced the arrival of five baby bald eagles.

On Friday, Lincoln Park Zoo’s three new male African lion cubs greeted the public in their outdoor habitat for the first time since they were born Jan. 9.

Chicagoans will enjoy another summer-like day, with the temperature predicted to hit what would be a record-setting 83 degrees on Thursday, according to the National Weather Service.