Head of a Flicker.
Occipital means “on the occiput.”
a. Forehead; b. crown; c. occiput; d. nape; e. chin; f. throat; g. jaw-patch, or mustache.
Nuchal means “on the nape.”
Primaries are the nine or ten wing-quills borne upon the last joint of the wing.
Secondaries are the wing-quills attached to the fore-arm bones.
Tertiaries are the wing-quills springing from the upper arm bones.
Wing coverts are the shorter lines of feathers overlapping these long quills.
Tail coverts are the lengthened feathers that overlap the root of the tail both above and below, called respectively upper and under tail coverts.