Deputy Peck, one of the main singers and songwriters of the series, is Sheriff Callie's trusty deputy and the deuteragonist of Sheriff Callie's Wild West. He is a red woodpecker with big yellow eyes and dressed up in a brown hat, a blue bandana, brown boots, and a gold star badge. Peck owns a mule named Clementine, whose slow, easygoing nature sometimes contrasts with Peck's character. Peck likes to eat corn and prairie peppers, but his favorite food is Trail Mix, as shown in "Peck's Trail Mix Mix-Up".