What types of feathers are needed for warmth?

* Down feathers: These are the soft, fluffy feathers that grow closest to the bird's body. They trap air and provide excellent insulation.

* Contour feathers: These are the larger, stiffer feathers that cover the bird's body. They help to keep the bird warm by blocking wind and rain.

* Semiplumes: These are feathers that have a mix of down and contour feathers. They provide some insulation but are also more breathable than down feathers.