A giraffe is pictured at Brookfield Zoo in November 2022. (WTTW News)

Brookfield Zoo is celebrating a big milestone. It was a century ago when construction on the grounds began.

Recovery work after the Repsol oil spill. (Courtesy of Oceana Peru)

Recently, two researchers with Brookfield Zoo received prestigious awards for their work in the field. Their current work focuses on the impacts of major oil spills on marine life.

Josie, a California sea lion, shows off her receiving skills as Brookfield Zoo celebrates the start of Bears football season. (Cathy Bazzoni / CZS-Brookfield Zoo)

Before the Chicago Bears kick off their 2022-23 season on Sunday, the team might want to send some scouts to Brookfield Zoo.

A baby addax calf, born July 2, with his mom, Simone, at Brookfield Zoo. (Jim Schulz / CZS-Brookfield Zoo)

The addax, a Saharan antelope, is threatened with extinction in the wild, where fewer than 100 exist. A baby just born at Brookfield Zoo is part of the species’ conservation plan.

Captive-born Mexican wolf pups being introduced into wild dens in 2018. (Mexican Wolf Interagency Field Team)

Once considered extinct in the wild, the Mexican wolf is making a comeback thanks to a recovery plan involving breeding and fostering programs at places like Brookfield Zoo.

Brookfield Zoo’s porcupette, born March 19. (Jim Schulz / CZS-Brookfield Zoo)

Brookfield Zoo is celebrating the arrival of an adorable baby porcupine. We had to know: How do mama porcupines give birth safely? 

North American river otters, once nearly extinct in Illinois, are a great comeback story. (Grayson Smith / U.S. Fish and Wildlife Service)

The Urban River Otter Research Project recently launched in Cook County. One of the early goals is to gather otter sightings from the public in order to get a sense of the extent of the animal’s presence in and around Chicago.

Titus, an African lion, channeling his inner house cat. (Jim Schulz / CZS-Brookfield Zoo)

Most of Brookfield Zoo’s 700 Christmas trees were shredded for mulch. But some were used by keepers’ to shake up animals’ routines. The results were entertaining. 

Seahorses. (Wal_172619 / Pixabay)

Brookfield Zoo is in the midst of a seahorse baby boom and caught the arrival of its newest little ones on camera. Dad made it look easy.

An Amur tiger. (TheOtherKev / Pixabay)

The 11-year-old tiger had received her first dose of a COVID-19 vaccine developed for animals. The zoo is now awaiting test results for other big cats that are exhibiting symptoms similar to the infected tiger’s.

One of the three capybara, just arrived at the Brookfield Zoo. (Jim Schulz / CZS-Brookfield Zoo)

Capybaras, native to Central and South America, are the largest members of the rodent family, tipping the scales at 130 pounds. Three of them have just arrived at the Brookfield Zoo.

A Linnaeus’s two-toed sloth at Brookfield Zoo receives a COVID-19 vaccine. (Cathy Bazzoni / Chicago Zoological Society-Brookfield Zoo)

Animals at Brookfield Zoo have begun receiving COVID-19 vaccinations, with Lincoln Park Zoo soon to follow, as federal and state officials approved the use of the inoculations.

A Boykin spaniel with an ornate box turtle in its mouth waits to hand it over. (Cathy Bazzoni / Chicago Zoological Society-Brookfield Zoo)

Specially trained “turtle dogs” took part in a field study of threatened ornate box turtles at Nachusa Grasslands, one of the species last homes in Illinois.

Meet Brookfield Zoo’s new mother-daughter Mexican wolves, Sibi and Lorena. (Jim Schulz / Chicago Zoological Society)

After self-imposed winter breaks, Lincoln Park Zoo and Brookfield Zoo are reopening to guests, with a number of safety precautions in place due to the coronavirus. Here’s what to expect.

Veterinarians, technicians and staff prepare Malena, a 10-year-old endangered Amur tiger, for total hip replacement surgery at Brookfield Zoo, Wednesday, Jan. 27, 2021 in Brookfield, Ill. (Ashlee Rezin Garcia / Chicago Sun-Times via AP)

An Amur tiger that underwent hip-replacement surgery only to dislodge the orthopedic implant within hours has been operated on again, officials at a suburban Chicago zoo said Monday. 

Hudson, Brookfield Zoo’s 14-year-old polar bear, frolics in the snow. (Jim Schulz / Chicago Zoological Society)

Both Brookfield and Lincoln Park zoos will temporarily close during January and February, but they have plenty of online content in the works to remain connected with the public.