Large numbers of birds will be passing overhead overnight Thursday and Friday as fall migration heats up.

It’s one thing to read about the male turtle’s mating “dance.” It’s another to witness it with your own eyes.

For many Chicagoans, visiting Judy and the rest of the small herd at Brookfield represented their sole chance to encounter a bison — the national mammal of the U.S.

Lake County Forest Preserves has acquired a 41-acre property in order to protect its “rare ecological attributes,” which include the largest heron and egret rookery in the county.

Brookfield Zoo Chicago is one of only a few zoos in the U.S. to have successfully bred and birthed pangolins. The newest pup arrived July 25, according to zoo officials.

The changes are detailed in the zoo’s $500 million Next Century Plan, which is in anticipation of the zoo’s 100th anniversary in 2034. Dr. Mike Adkesson, president and CEO of Brookfield Zoo, joined “Chicago Tonight” to discuss the plan.

The not-so-little one — measuring 5 feet and weighing 105 pounds — arrived Wednesday night, the first beluga born at Shedd since 2020.

Something appears to be lurking in the water at Lincoln Park’s North Pond, and some swear it’s an alligator.

After confirming several black bear sightings in southern Illinois in recent weeks, wildlife officials issued a reminder to residents in northern Illinois that furry guests might also pay a visit here.

Brookfield Zoo Chicago is planning an expansion that, over the next 15 years, will see traditional exhibit spaces transformed into multi-species “eco-regions” designed to mimic natural environments.

The chicks have seemed healthy, but then become lethargic. Necropsies have been performed to help determine the cause.

What happens when an endangered bird nests in a hayfield set to be harvested? A great debate has been swirling in Northwest Indiana. 

The egg is the product of a recent pair bond between native-born Imani, who hatched at Montrose Beach in 2021, and Searocket, one of the 5-week-old captive-reared piping plover chicks released at the beach last year.

May 23 is World Turtle Day. Sure, it’s a fake holiday, but it’s a good reason to take a closer look at the many species that make their home in northern Illinois.

Hundreds of cities around the world will take part in the friendly City Nature Challenge competition — Friday through Monday — to see who can identify the most biodiversity.

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