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A warbling vireo photographed at Montrose Point Bird Sanctuary by Rob Curtis.

Here’s something that might surprise you: The best place in the entire state of Illinois to see birds during their spring migration is in the city of Chicago. 

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For the first time, Brookfield Zoo is exhibiting a pangolin, a rare animal native to Africa and Asia. (Courtesy of Chicago Zoological Society)

For the first time, Brookfield Zoo is exhibiting a pangolin, a rare animal native to Africa and Asia.

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Coyotes have made a remarkable comeback in Chicago. What are the secrets to their survival in a dense metropolis? Marcus Krahnforst hunts for clues with noted biologist Stan Gehrt in this “Urban Nature” episode.

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(© Shedd Aquarium / Brenna Hernandez)

Starting July 1, visitors to the Shedd can experience nearly all the aquarium has to offer for one price. And for Chicago residents, this means potential savings of nearly 50 percent.

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The backyard chicken trend gets a leg up with the prospect of temporary ownership – and farm-fresh eggs.

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A scientist holds a bioprosthetic mouse ovary made of gelatin with tweezers. Inset: A mouse that was born from the bioprosthetic ovary lays next to its mother mouse. (Credit: Northwestern University)

Infertile mice with 3-D printed ovaries were able to give birth to healthy pups, according to a new study from Northwestern University. 

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The monarch butterfly’s remarkable migration is in peril. Its habitat has been decimated by rapid urbanization and changing agricultural practices. Could cities come to the rescue?

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(BirdPhotos.com / Wikimedia Commons)

Why do some squirrels live in more affluent neighborhoods, while others dwell in more disadvantaged ones? WTTW's online series “Urban Nature” has the story.

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(Anne Brooke / U.S. Fish and Wildlife Service)

Microphones placed across the Chicago area by the Lincoln Park Zoo are tracking the return of bats to the region this spring. 

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(Forest Preserve District of DuPage County)

A west suburban forest preserve is dispatching an army of freshwater mussels to clean up contaminated waters. “They may be small, but they have enormous beneficial effects on the lives of other organisms,” said one staff member.

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An update to our March story about bald eagles returning to Cook County.

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Dead birds collected by the Chicago Bird Collision Monitors were given to the Field Museum's Bird Division. (Josh Engel / The Field Museum)

For migrating birds, Chicago can be a dangerous place. But scientists, architects and volunteers are now teaming up to make the city a leader in bird-friendly design. The story is told in WTTW's online series “Urban Nature.”

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(Ann Froschauer / U.S. Fish and Wildlife Service)

Cook County Department of Public Health officials are reminding residents that bats become active this time of year, which means the possibility of exposure to rabies is increasing.

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(Shedd Aquarium)

Shedd Aquarium’s dolphin calf Kukdlaa celebrated his first birthday with positive results from a physical checkup. And with cake, of course.

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(Jim Schulz / Chicago Zoological Society)

Just in time for Easter, a reindeer named Bunny gives birth to a male fawn – the first reindeer born at Brookfield Zoo since 1980. 

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Life model of the new species Teleocrater rhadinus, a close relative of dinosaurs, preying upona juvenile cynodont, a distant relative of mammals. (Museo Argentino de Ciencias Naturales)

A Field Museum researcher is among a global group of scientists who have discovered an early dinosaur that reshapes our understanding of dinosaurs’ evolution.