Hackles

The hackles are the long, fine feathers which are found on the backs of certain types of domestic chicken. They are often brightly coloured, especially on roosters. These feathers are often used as fly lures. The term can also apply to the erectile hairs along the back of the neck of an animal, especially of a dog. ...
Found on http://en.wikipedia.org/wiki/Hackles

Hackles

A rooster's cape feathers.
Found on http://www.backyardchickens.com/a/glossary-definitions-of-common-terms-for-

Hackles

feathers on the back of the head, raised when the bird is in a stressed or aggressive state
Found on http://www.encyclo.co.uk/local/22220

Hackles

feathers over the back of a chicken which are pointed in males and rounded in females
Found on http://afspoultry.ca.uky.edu/extension-glossary

Hackles

Hairs on neck and back raised involuntarily in fright or anger.
Found on http://www.akc.org/about/glossary.cfm

Hackles

Hairs on neck and back raised involuntarily in fright or anger.
Found on http://www.apluspetgoods.com/petsupplies/dog-glossary.php

Hackles

Long and pointed neck feathers that can extend across mantle and wing-coverts.
Found on http://www.jacanaent.com/PhotoLib/Glossary.htm

Hackles

Long and pointed neck feathers.
Found on http://www.encyclo.co.uk/local/22219

hackles

The guard hairs along the back of an animal, especially on the neck and shoulders. The hackles are often raised as a form of communication, especially to indicate aggression.
Found on http://www.northernlightswildlife.com/glossary.html
No exact match found