Complex sentence: The greater wing-coverts, primary-coverts, and tertiaries dark brown, with a blue tinge on the outer webs; sides of the head and whole lower plumage blue, very similar to the upper parts.
Split into simpler sentences: The greater wing coverts, primary coverts, and tertiaries dark brown, with a blue tinge on the outer webs. Sides of the head and whole lower plumage blue, very similar to the upper parts.