Which of the following does not describe a portion of a raptor's wing?

The cere is a fleshy, often colorful area located at the base of a raptor's beak, primarily in species such as hawks and falcons. It serves as a prominent feature for species identification and communication, but it is not part of the wing structure.

In contrast, coverts are small feathers that sit on top of larger flight feathers, providing both insulation and aerodynamic benefits. The alula consists of a small, specialized set of feathers on the leading edge of the wing that helps with control during flight. Secondaries are the longer flight feathers located on the outer portion of the wing that contribute significantly to the bird's lift and maneuverability in the air.

Understanding these components of a raptor's wing is essential for grasping how these birds achieve flight and navigate their environments effectively.