What behavior does a newly hooded hawk display when it's comfortable?

A newly hooded hawk that displays comfort typically fluffs out its flank feathers and may tuck up one foot. This behavior indicates a relaxed state and signifies that the bird feels secure in its environment. Fluffing the feathers helps with thermoregulation and can also serve as a non-verbal signal to others, indicating that the bird is not threatened and is in a calm state.

In contrast, the other behaviors do not suggest comfort. Attempting to take flight would indicate restlessness or distress, while cawing loudly can be a sign of agitation or a need to communicate discomfort. Hiding its head under a wing typically suggests a desire to retreat or a signal of insecurity, rather than comfort. Thus, fluffing feathers and tucking a foot is the appropriate behavior that signifies a newly hooded hawk is at ease.