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(Julia Fuller / Lincoln Park Zoo)

You’ll need to look closely to spot Lincoln Park Zoo’s new baby monkey. The infant, born Oct. 15 to first-time parents, is barely visible as it clings to its mother’s neck.

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(Jill Wagner / Lincoln Park Zoo)

Did you know it’s International Sloth Day? We check in with one of Lincoln Park Zoo’s experts to learn about these furry, slow-moving animals. 

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Lincoln Park Zoo's upcoming Sea Explorer 5-D lets visitors "dive" into the ocean in a virtual submarine. (Courtesy Attraktion!)

A new experience coming this fall to Lincoln Park Zoo will allow visitors “dive” into the ocean and explore landscapes and wildlife at the North and South Poles or in deep ocean waters. 

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Black-crowned night herons average about 2 feet in length and weigh nearly 2 pounds. (Courtesy Lincoln Park Zoo)

The black-crowned night heron is one of the rarest birds in Illinois. Lincoln Park Zoo now hosts a colony of more than 600 herons, but things have getting a bit crowded. 

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(Courtesy Lincoln Park Zoo)

It looks like an art project, but a seven-floor structure at Lincoln Park Zoo is outfitted with logs, bricks, sticks and other materials to provide cozy spaces for insects to nest.

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(Jill Wagner / Lincoln Park Zoo)

Luigi, a 1-year-old Hoffman’s two-toed sloth, is getting settled alongside his new primate neighbors in a mixed-species exhibit.

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(Courtesy of Lincoln Park Zoo)

A trio of newly arrived birds is making noise – lots of it – inside Lincoln Park Zoo’s Dry Thorn Forest exhibit.

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(Courtesy Lincoln Park Zoo)

About a dozen different species were under close watch during the event as scientists looked for any changes in behavior. 

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(Alex Ruppenthal / Chicago Tonight)

Animal behavior experts noticed the biggest change in one particular species during Monday’s eclipse: humans. 

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(Peter Roome / Flickr)

Like scientists across the country, Lincoln Park Zoo’s animal experts will spend Monday’s solar eclipse carefully observing the zoo’s residents for changes in behavior.

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(Chris Bijalba / Lincoln Park Zoo)

The zoo’s newest residents are being hand-reared by keepers, and scientists will analyze their genetics as part of an international species survival plan.

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(Lincoln Park Zoo)

The young males belong to a highly social zebra species and will eventually share a habitat with the zoo’s giraffes. 

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Aje, a 2-year-old male penguin at Lincoln Park Zoo. (Todd Rosenberg / Lincoln Park Zoo)

For the first time, Lincoln Park Zoo is offering visitors a chance to get up close and personal with their African penguins. We meet three waddling, webbed-feet bachelors.

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(Lincoln Park Zoo)

Lincoln Park Zoo recently launched a web series to chronicle the latest crushes, power struggles and other dramatic twists and turns surrounding the lives of its 15 African penguins.

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(Lincoln Park Zoo)

Visitors can expect snow flurries on their next trip to the zoo, even in the middle of summer. Four snowy owl chicks hatched last month are already flapping their wings and will soon attempt to fly. 

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(Courtesy of Lincoln Park Zoo)

Four webbed-feet members of a rare and endangered duck species have a new home in Chicago.