More to explore:
Duck Hat by Stitch11, links to more free animal hats free patterns
Adorable Duck Hat ~ Free Pattern
The Most Adorable Duck Hat Pattern
Animal Hat Crochet Patterns
Ten adorable crochet hat patterns for free, mostly for little kids, but some have adult sizes too!
Top 10 animal crochet hats - free patterns @ The Yarn Box
Oh my gosh, the R2D2. Noah would die.
Morning Frost - A Free Crochet Hat Pattern Lots of looks by just changing the color pattern.
pattern for a sweet pixie hat. Instructions for infant size, but should be simple to size up for larger pixies.
Garden Party. Crochet Hat Free pattern for Kids & Adult
Crabby Cardinal Hat ~ Free Pattern
Free Crochet Superman Earflap Hat Pattern. This pattern is SUPER-awesome! I love it! -Lee Ann H
Just finished this 10 minutes ago! its an super easy pattern to follow and works up surprisingly fast! ~Sarah
Crochet fish hat
Easy Crochet Hat Pattern - the Bella Rose Beanie
Stitch11 -Free Newborn Witch Hat Pattern