morphology of a bird [2]

head

Anterior portion of the body containing the main sensory organs and the brain.

auriculars

Lateral portion of the head in back of the malar region at the level of the eye.

eye ring

Ring of tiny feathers surrounding the eye.

eyebrow stripe

Band of small feathers above the eye.

malar region

Lateral portion of the head below the eye extending from the base of the bill to the auriculars.

lore

Space between the base of the beak and the eye.

lower mandible

Bone forming the lower portion of the bill.

upper mandible

Bone forming the upper portion of the bill.

nostril

External orifice of the nasal cavity located at the base of the upper portion of the bill having a poorly developed olfactory function.

forehead

Upper front part of the head, between the bill and the crown.

crown

Top part of the skull, behind the forehead.