Here you have it! Finally A crochet pattern for a boa constrictor!
intermediate level.

Basic understanding of crocheting in the round, inc, dec, sc, simple sewing is required. 
you will need:

3.75 mm hook 
worsted weight yarn in chosen colors (150 yards each)
polyfill 
10 mm safety eyes 
yarn needle 
scissors

Finished snake is approximately 48 inches long.