The planting of a non-native milkweed and the practice of captive-rearing monarch caterpillars have been identified as two possible sources of monarchs failure to survive their fall migration.  

Attendees of the outdoor concert venue the Salt Shed might have been exposed to a bat during a Sept. 12 concert for the band Goose, according to the Chicago Department of Public Health.

Zookeeper Atthapon Nundee has been posting cute moments of the animals in his care for about five years. He never imagined the zoo’s newborn pygmy hippo would become an internet megastar within weeks.

At the end of August, participants in the Sihek Recovery Program, of which Brookfield Zoo is a member, took the first small step toward one day bringing birds and birdsong back to Guam.

The bull was captured Thursday evening after the McHenry County Sheriff’s Office warned in a Facebook post around 4:30 p.m. that “there is a loose bull in the vegetation” in Marengo, about 60 miles northwest of Chicago.

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.