Table 1.

Behavioral ethogram.

Behaviors		Description
Aggressive peck		Forceful pecks to the head or neck of the other bird
Body peck	Severe peck	Vigorous pecks to at the feather on the wing, back, or tail, that tend to pull, break or remove the feathers
	Feather peck	Gentle pecks/nibbles at the feathers on the wing, back, or tail
Kick		Forceful extension of leg to make contact with the other bird
Threat		Standing with the neck erected and hackle feathers raised in front of the other bird
Fight with peck		Similar to threat, but at least one aggressive peck is involved
Fight with kick		Similar to threat, but at least one kick is involved

The behavioral ethogram is adjusted based on Dennis et al. (2013).