Adorable Wallaby Joeys at Brookfield Zoo

Anana Polar Bear

Annual Tree Trim at Brookfield Zoo

Animals Keep Cool at Brookfield Zoo

Animals at Brookfield Zoo Enjoy Shamrock-Shaped Treats

Animals Receive Halloween Pumpkins

Allen's Swamp Monkeys at Brookfield Zoo

African Painted Dogs and Party for the Planet

Adorable Kangaroo Joeys at Brookfield Zoo

Addax Mom and Cute Addax Baby at Brookfield Zoo

Addax Calves at Brookfield Zoo

Addax Calf Born at Brookfield Zoo!

A Unique Friendship in Tropic World

A Lemur Thanksgiving at Brookfield Zoo!

2014 Science Fair

2013 Zoo Run Run at Brookfield Zoo

2012 Leap Day at Brookfield Zoo

2012 Zoo Run Run

2009 VeteransDay at Brookfield Zoo

75th Celebration-NBC spot

3-Month-Old Blackfooted Cat at Brookfield Zoo

9-Month-Old Gibbon Becoming More Adventurous at Brookfield Zoo

AIP Master's Degree

¡Viva la Fiesta! at Brookfield Zoo

Top 10 World's Most Dangerous Animals

TOP 15 Best eagle attacks in the world