Types of Feathers Part 1

I found this in the book  Raising Chickens for Dummies.


On the neck:
  The row of feathers around the neck constitutes the hackles. Hackle feathers can stand up when the chicken gets angry. These feathers are often a different color than the body /feathers, and they may be colorful in male chickens, the hackle feathers are pointed and iridescent. Female hackle feathers have rounded tips and are duller.


On the belly and midsection:
     The belly and remaining body areas of the chicken are covered with small, fluffy feathers. In many cases, the underside of the bird is lighter in color.