Celebrate Earth Day with Chicago's adorable endangered animals

Happy Earth Day, Chicago!

The EPA provides plenty of boring tips for helping protect the environment. We thought we’d spice it up with the most adorable (and sadly, endangered) animals that have lived in Chicago’s zoos and aquariums over the years.

This red wolf pup is all smiles during a check-up at Lincoln Park Zoo. | John J. Kim/Sun-Times

Leaving your car at home twice a week can cut greenhouse gas emissions by 1,600 pounds per year

A snow leopard cub born at Brookfield Zoo last year. | Jim Schulz/Chicago Zoological Society

Recycling electronics helps avoid pollution by capturing and reusing hazardous substances such as lead or chromium

Marley, an endangered Grand Cayman lue iguana at the Shedd Aquarium. | Nam Y. Huh/AP Photo

Not pre-rinsing dishes can save as much as 20 gallons of water per load

A peregrine falcon and her chick on the 25th floor of a building on Michigan Avenue. | Charles Bennett/AP Photo

The average washing machine uses 40.9 gallons of water per load

A pair of African wild dog pups lounging at Brookfield Zoo. | Rich Hein/Chicago Sun-Times

Chicago has retrofitted 7,820 residential units to increase energy-efficiency

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George Parson, director of collections at Shedd Aquarium, holds up an endangered baby Loggerhead turtle. | Jean Lachat/Sun-Times

A full bathtub requires about 70 gallons of water. a five-minute shower saves 10-25 gallons

An endangered red wolf pup born at Lincoln Park Zoo. | Sun-Times file photo

The meat industry generates nearly one-fifth of the man-made greenhouse gas emissions worldwide

Chuckwalla lizards climb on their mother at Brookfield Zoo. | Jim Schulz/Chicago Zoological Society

Imperial zebras chase each other at Lincoln Park Zoo. | Greg Neise/Lincoln Park Zoo