Supercilium - the eyebrow zone of a bird.

Crown - the top of a birds head, which may have a crest in certain species.

Supralorals - the beginning of the supercilium, or the area above the lores.

Lores - the area of very small, short feathers in front of the eye, between the eye and the beak.

Bill - the mouth opening of a bird that varies in size, shape, weight, and use throughout species.

Auriculars - the area of varied feathers over the birds ear.

Malar - the area of feathers below the lores, adjacent to the throat.

Throat - the area of extensive feathers that is below the birds bill area, but above the breast.

Breast - the feathers that make up the front of a bird, resembling a chest. On some birds there is a breast band, which a band of different colored feathers that stretches form the left side of the breast to the right side.

Sides - the feathers below the curve of the wing, between the breast and the flanks.

Belly - the very underside of a bird.

Flanks - the area of long feathers that runs below the primary edge of the wing.

Toes - the metatarsus of a bird, shape and size varies depending on the species.

Tarsus - the area from the heel of a bird to their toes.

Tibial feathers - the feathers on the birds tibia, where the leg meets the belly.

Vent - the feather patch under the base of the tail. (marked incorrectly as undertail covers in the diagram)

Uppertail coverts - the patch of feathers on the top of the base of the tail.

Undertail coverts - the underside of the feathers of the tail (not marked on diagram)

Tail - The shaft of feathers that birds use to steer their flight.

Primaries - The outermost flight feathers on the wing.

Secondaries - the feathers that are in between the primary feathers and the tertiary feathers.

Tertials - the last three secondaries.

Primary coverts - the outermost covert on the wing. In sparrows it covers the Alula, which is small covert feather used for steering.

Greater coverts - the thin strip of feathers between the Primary and Median coverts.

Median coverts - the wing coverts underneath the Scapulars and above the Greater Coverts.

Scapulars - the base of the wing. More visible on birds of prey than sparrows. (Mislabeled as Mantle in the diagram)

Mantle - the upper back, between the Mantle and uppertail coverts is called the back. (Mislabeled as Scapulars in the diagram)