Frontier Airlines has decided to let the public choose its next "spokesanimal." The winner, to be announced at the end of April, will be the next animal to appear on a Frontier aircraft tail. Each of Frontier's planes has a "spokesanimal" on its tail, with more than 60 in all.

Fans voting for their favorite candidate at  FrontierAirlines.com will receive a special offer by email for a discount on future Frontier travel and will also be entered to win up to $2,500 in Frontier Fly Bucks. Fans can also visit Frontier's Facebook page and enter to win a number of prizes, including the new iPad, Kindle Fire and Frontier Fly Bucks.

The 18 contenders in the running include:

1. Doris the Chicken
2. Vladimir the Bat
3. Tina the Grebe
4. Doug the Dung Beetle
5. Enrique the Tree Frog
6. Polly the Parrot
7. Paula the Pig
8. Ralph the Ram
9. Alivina the Owl
10. Samson the Sloth
11. Melvin the Turtle
12. Chloe the Chipmunk
13. Cammie the Cow
14. Joanne the Giraffe
15. Fred the Walrus
16. Duke the Arctic Dog
17. Will & Hill the Prairie Dogs
18. Mario the Lizard