Mechanism of behavior/ nervous system and behavior

1. https://www.ukessays.com/essays/psychology/nervous-system-influence-shaping-5842.php

2. Perspective on animal behavior by Goodenough, McGuire and Wallace. pp 149-197

Practical:

Pecking behavior of chickens.

1. https://www.communitychickens.com/pecking-order-explained/