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Pair of Brookfield Polar Bears Involved in Artificial Insemination

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Chicago Zoological Society veterinary staff position Hudson, Brookfield Zoo’s 12-year-old male polar bear, in preparation for a CT scan. (Jim Schulz / Chicago Zoological Society)

Hudson, a 1,000-pound male polar bear at Brookfield Zoo, underwent a historic checkup this week when he received a CT scan and had semen collected, which was used to inseminate two female polar bears. 

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A North American river otter born in February at Brookfield Zoo had to be euthanized after his health declined. (Jim Schulz / Chicago Zoological Society)

Staff made the decision to euthanize the North American river otter pup after his health declined over the weekend. “This was an enormously hard decision to make,” said Bill Zeigler of the Chicago Zoological Society.

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A North American river otter born in February at Brookfield Zoo will be relocated to a zoo with otters of a similar age. (Jim Schulz / Chicago Zoological Society)

Staff at the zoo are caring for the pup because his mother was unable to provide him with proper nourishment. His arrival in February marked the zoo’s second successful birth for this once-endangered species.

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A male giant anteater pup was born at Brookfield Zoo on Dec. 15, 2018. (Jim Schulz / Chicago Zoological Society)

The unnamed pup, born Dec. 15, can be seen alongside his mom on select days in the zoo’s “Tropic World: Africa” exhibit.

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Valentino, a small African antelope, was born Thursday at Brookfield Zoo. (Cathy Bazzoni / Chicago Zoological Society)

The tiny African antelope born on Valentine’s Day was euthanized Tuesday, according to zoo officials, who identified a birth defect that affected the animal’s ability to swallow normally.

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David, a young male pangolin, is part of Brookfield Zoo’s “Habitat Africa! The Forest” exhibit. (Credit: Chicago Zoological Society)

Researchers estimate that more than one million pangolins have been taken from the wild over the past decade as demand has soared for their meat and scales. What one local institution is doing to save these scaly anteaters.

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Valentino, a small African antelope, was born Thursday at Brookfield Zoo. (Cathy Bazzoni / Chicago Zoological Society)

A tiny African antelope that belongs to one of the smallest species of its kind in the world received a name befitting his Feb. 14 birthday.

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An animal care specialist at Brookfield Zoo measures the girth of a dolphin. (Courtesy Chicago Zoological Society)

Unlike the industry serving health-conscious humans, there are no books, infomercials or 12-week programs to help dolphins optimize their diets. But there is an app for that, thanks to new research by animal welfare specialists.

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Hudson, a polar bear at Brookfield Zoo (Courtesy Chicago Zoological Society)

Brookfield Zoo and Lincoln Park Zoo plan to close for parts of the week as record-breaking lows are expected to move into the area.

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Apache, foreground, a 7-year-old old male Mexican wolf recently arrived at Brookfield Zoo to be paired with 2-year-old Ela. (Jim Schulz / Chicago Zoological Society)

Zoo officials say they’re hopeful that 2-year-old Ela and newcomer Apache, 7, will have a successful breeding season this winter and produce a litter of wolf pups in the spring.

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A group of Mexican wolves at Brookfield Zoo (Jim Schulz / Chicago Zoological Society)

They are one of the most successful packs within the nationwide Mexican Wolf Recovery Program, but nine of the 10 wolves will leave Chicago for new homes as part of a plan to help save the endangered species.

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Layla, an eastern black rhinoceros at Brookfield Zoo (Courtesy Chicago Zoological Society)

The 2,300-pound rhinoceros, Layla, logged an important milestone this week, celebrating her eighth birthday just months after overcoming a near-deadly infection.

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(Jim Schulz / Chicago Zoological Society)

The completely blind amphibians, found in Texas, are a translucent white color with bright red gills. Brookfield Zoo is one of just three North American institutions to host the rare creatures.

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David, a young male pangolin, is part of Brookfield Zoo’s “Habitat Africa! The Forest” exhibit. (Courtesy Chicago Zoological Society)

More than a million pangolins have been poached from the wild in the past 10-15 years, according to Brookfield Zoo. What conservationists are doing to change that.

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(Jim Schulz / Chicago Zoological Society)

A porcupette, or baby porcupine, was born last month at Brookfield Zoo and is being hand-reared by the zoo’s animal care and veterinary staff. 

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Two wild-born Mexican gray wolf puppies arrive at Brookfield Zoo as part of the U.S. Fish & Wildlife Service’s recovery program for the species. (Mexican Wolf Interagency Field Team / Chicago Zoological Society)

Their recovery has been a national concern for decades. What’s happening locally in the effort to save the Mexican wolf.