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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.

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Orangutans are one of humankind’s closest cousins. We meet a baby orangutan as she takes a trip to the doctor.

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(Cathy Bazzoni / Chicago Zoological Society)

Brookfield Zoo welcomed two newborn Amur leopards in April. The male cubs are scheduled to make their public debut in mid-July. 

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(Jim Schulz / Chicago Zoological Society)

Maxine, a bottlenose dolphin at Brookfield Zoo, died June 2 after suffering an acute bacterial infection, the zoo announced Tuesday. 

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(Courtesy Chicago Zoological Society)

A set of proteins long used to evaluate the well-being of humans can also serve as a marker for the welfare of animals in zoos and aquariums, according to a new study. 

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(Courtesy Chicago Zoological Society)

The latest member of Brookfield Zoo’s four-generation family of western lowland gorillas was born June 1, the third offspring of Koola, the newborn’s 23-year-old mother. 

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An African burrowing scorpion is among the highlights of Brookfield Zoo’s new “Amazing Arachnids” exhibit. (Jim Schulz / Chicago Zoological Society)

Get a close-up look at 100 live eight-legged critters – aka arachnids – including spiders, scorpions, tarantulas and more at Brookfield Zoo.

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Michelle Soszynski, a senior veterinary technician at Brookfield Zoo, monitors Layla, a 7.5-year-old eastern black rhinoceros, as she receives a CT scan inside Brookfield Zoo’s Pachyderm House. (Jim Schulz / Chicago Zoological Society)

Following a historic diagnostic procedure last month, Layla, a 2,300-pound eastern black rhinoceros, underwent life-saving surgery last week to relieve an infection.

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(Courtesy Chicago Zoological Society)

Hoping to identify the source of an infection, veterinarians performed what is thought to be the first ever CT scan on a rhinoceros.

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(Courtesy Chicago Zoological Society)

The 50-year-old gorilla was the zoo’s oldest animal. “Knowing it’s the right decision doesn’t make it hurt any less,” said Amy Roberts, curator of mammals for the Chicago Zoological Society.

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(Jim Schulz / Chicago Zoological Society)

One year after welcoming its first baby reindeer in nearly four decades, Brookfield Zoo added another newborn fawn this week.

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(Jim Schulz / Chicago Zoological Society)

The yet-to-be-named chick is healthy and being hand-reared by animal care staff, the zoo said this week.

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(Jim Schulz / Chicago Zoological Society)

St. Patrick’s Day festivities kicked off a day early at Brookfield Zoo last week, where seals, camels, lemurs, orangutans and gorillas got shamrock-shaped and green-colored treats.

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Nora, a 4-year-old western lowland gorilla, eats a heart-shaped treat at Brookfield Zoo. (Jim Schulz / Chicago Zoological Society)

Date or no date, single or taken, animals at Brookfield Zoo experienced Valentine’s Day with the best kind of gift: food.

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Chicago Zoological Society’s veterinary staff perform an emergency appendectomy on Ben, a 40-year-old orangutan at Brookfield Zoo. (Jim Schulz/Chicago Zoological Society)

Ben, a 40-year-old orangutan at Brookfield Zoo, underwent an emergency appendectomy last month after veterinary staff discovered a ruptured appendix. 

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Brookfield Zoo veterinary staff monitor Zana, a 5-year-old Mexican wolf, during an artifical insemination procedure Feb. 4. (Courtesy Chicago Zoological Society)

Nearly 30 years ago, scientists began collecting semen samples from Mexican wolves. On Sunday, Brookfield Zoo artificially inseminated one wolf as part of an effort to boost the genetic health of the endangered species. 

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