"Chinook the Gray Wolf" will fly across the skies on Frontier's 100th jet.

Frontier Airlines welcomed its 100th aircraft to its fleet in late July, and its tail features a wolf well-known to the Colorado Wolf and Wildlife Center.

The plane's tail features a wolf howling amidst a starry night backdrop. "Chinook the Gray Wolf" gets its namesake from a female wolf-dog hybrid rescued in 1993. Chinook's rescue drove the founding of the Colorado Wolf and Wildlife Center located in Divide, Colorado. Chinook passed away about 13 years ago, but her legacy still lives on in the continued work at the Teller County wildlife sanctuary. 

Colorado Wolf and Wildlife Center Founder Darlene Kobobel posted a touching remark on the sanctuary's Facebook page regarding Frontier's brand-new plane. 

"To see this beautiful wolf painting flying high in the sky is just breathtaking," she wrote. "She symbolizes so many things." 

Courtesy Colorado Wolf and Wildlife Center (Facebook)

The plane's arrival comes just in time for a 2020 ballot measure to restore the gray wolf population in Colorado. The sanctuary is also in the process of building new enclosures.

Denver-based Frontier's 100th jet, an A320neo assembled in Mobile, Alabama, is a significant milestone for the low-cost airline. According to a press release on the company's website, Frontier operates the country's largest A320neo fleet, becoming an industry leader in sustainability and carbon reduction. 

"We have significantly expanded our fleet in recent years as Frontier has continued to grow both domestically and internationally," said Frontier CEO Barry Biffle. 

The A320neo ("neo" stands for "new engine option") is a part of Airbus' A320 family. It's upgraded engines and wingtips make the plane one of the world's most fuel-efficient single-aisle aircraft. 

"Airbus is pleased to reach this significant 100th aircraft milestone with Frontier Airlines, and to be a part fo the airline's continuing growth and success," said Airbus Chairman and CEO C. Jeffrey Knittel. "With 160 more aircraft on order, we look forward to many more of these milestones." 

To help the airline stand out, Frontier names and paints animals on each aircraft's tail and many are inspired by real animals. In October 2019, "Wellington the Black-Footed Ferret" paid homage to Wellington, Colorado, and its local efforts to revitalize the black-footed ferret population. The species is one of the most endangered in North America. 

What's your favorite Frontier Airlines animal? Share yours in a comment below.