The Illinois Department of Natural Resources said it is monitoring a bear that’s been spotted hanging out all week in St. Clair County, just east of St. Louis.

Chicago's piping plover pair, Imani and Sea Rocket, are officially expecting.

We asked experts what to do when you see something in the Chicago River that doesn’t belong there.

Chicago was once a swamp. In some places, it still is. But will climate change undo wetland restoration efforts?

A proposed change to the United States’ Endangered Species Act could threaten not only to reverse decades of progress but accelerate the pace of loss, experts said.

The City Nature Challenge is a friendly global competition designed to showcase the biodiversity in urban yards, parks and nature preserves.

House Bill 2627, sponsored by state Rep. Joyce Mason, D-Gurnee, would regulate the mink industry at the state level, creating mink farm licensing and requirements. But proponents and opponents have two vastly different opinions on what the bill really aims to do.

The beloved actor of “The Golden Girls” fame was celebrated with a new U.S. Postal Service stamp at a first-day-of-issue ceremony at the Los Angeles Zoo on Thursday.

A newly identified parasitic wasp that buzzed and flew among dinosaurs 99 million years ago evolved a bizarre mechanism to snare other creatures and force them to unwittingly shelter its young, according to new research.

A group of microscopic sunflower sea star larva arrived at Shedd Aquarium last year and have been bulking up behind the scenes ever since. Now, after growing 16,000%, they’re ready to make their public debut.

The decades-old St. Patrick's Day tradition routinely attracts tens of thousands of revelers to the riverfront, but in recent years it's also attracted criticism from environmentalists.

In a lot of ways, the history of the North American beaver is interwoven with the history of Chicago.

Shedd Aquarium’s 6-month-old baby beluga is hitting key development milestones, and now it needs a name.

Wildlife professionals and advocates are grappling with an avian influenza outbreak that seems to be growing more virulent among Chicago's wild birds.

Three new species of king cobras have recently been identified, and the Field Museum’s collection has been harboring one of the rarest for nearly 80 years.

A Chilean flamingo died Jan. 8 and a harbor seal died Jan. 9, with testing confirming highly pathogenic avian influenza (HPAI) as the cause, Lincoln Park Zoo officials said.