Grizzly Bears at Brookfield Zoo Celebrate 20th Birthday

Baby Antelope at Brookfield Zoo

3-Month-Old Blackfooted Cat at Brookfield Zoo

JoJo Gorilla Arrives at Brookfield Zoo

Pepe Penguin Greets Guests at Brookfield Zoo

Dinosaurs Alive! is Back!

Happy Holidays from the Chicago Zoological Society

Butterflies Exhibit at Brookfield Zoo

Cookie Cockatoo Turns 79 Years Young

Young Cats Enjoy the Snow at Brookfield Zoo

Great Gorillas Going Ape at Brookfield Zoo

Scream Vacation at Brookfield Zoo's Creatures of the Night

Cookie Cockatoo's 78th Birthday

Melon Binturong at Brookfield Zoo

Pumpkin Enrichment at Brookfield Zoo

Fun Young Chuckwallas at Brookfield Zoo

2012 Leap Day at Brookfield Zoo

Brookfield Zoo Giraffes On the Run

Mesozoic Idol T-Rex (Week 16-final)

Xtreme BUGS Challenge - Orb Weaving Spider

Cookie Cockatoo Retires at Brookfield Zoo

Celebrate Corky Turtle Birthday at Brookfield Zoo

Dwarf Mongoose Pups Born September 13

Fun at Fiesta para Todos!

Mesozoic Idol Deinonychus (Week 7)

Duet of Singing Gibbons at Brookfield Zoo