Which feather type is found under the wing and is considered protective?

The feather type found under the wing that is considered protective is referred to as coverts. Coverts serve as a layer of protection for the underlying feathers and the skin. They are shorter, overlapping feathers that help streamline the wing and provide insulation, as well as protection from external elements and potential abrasions that could harm the more delicate flight feathers beneath them.

Coverts work in conjunction with other feather types to ensure that the wings function effectively during flight while also providing necessary protection. Their strategic placement under the wing highlights their role in both aerodynamics and safeguarding the bird's physiology.