HomeGlossary Bird topography Eye-ring A ring of contrasting feathers or bare skin around the eye. A complete versus a broken eye-ring separates several flycatchers and vireos. Bird topographyRelated termsFull glossary Tertials The innermost flight feathers, next to the body, which often cover the folded primaries on a perched bird. Primaries The outermost flight feathers of the wing, attached to the "hand"; they provide most of the forward thrust. Secondaries Flight feathers along the "forearm" that form the inner trailing edge of the wing. Nape The back of the neck. Malar stripe A dark stripe running from the base of the bill down the side of the throat. Primary projection How far the primary tips extend beyond the tertials on a perched bird.
Tertials The innermost flight feathers, next to the body, which often cover the folded primaries on a perched bird.
Primaries The outermost flight feathers of the wing, attached to the "hand"; they provide most of the forward thrust.