Down feathers

Definition

Down feathers are soft, fluffy feathers found beneath the tougher exterior feathers of birds. They provide excellent insulation by trapping air close to the bird's body, helping to maintain body temperature.

5 Must Know Facts For Your Next Test

1. Down feathers are primarily used for thermal insulation in birds.
2. These feathers lack the interlocking barbules that give structure to contour feathers.
3. Down feathers are particularly abundant in young birds and waterfowl.
4. They can be harvested sustainably from live ducks and geese or as a byproduct of meat production.
5. In addition to natural habitats, down is commonly used in human products such as jackets, bedding, and sleeping bags.

Review Questions

• What is the primary function of down feathers in birds?
• How do down feathers differ structurally from contour feathers?
• Name two types of birds that typically have a high abundance of down feathers.

Related terms

Contour Feathers: These are the outermost feathers that give shape and color to a bird's body while also aiding in flight.

Filoplume Feathers: Hair-like structures that play roles in sensory functions and monitoring feather position.

Preen Gland: A gland located near the base of a bird's tail that secretes oil used for maintaining feather health and waterproofing.