Pellets regurgitated by birds are composed of which parts?

Pellets regurgitated by birds are composed of which parts?

• A. Feathers and scales
• B. Shell fragments
• C. Plant matter
• D. Bones and fur

Answer: (D)

Pellets reflect the indigestible parts of what the bird has eaten. After soft tissues are broken down in the digestive system, materials like bones and fur from the prey cannot be dissolved, so they’re compacted in the gizzard and then regurgitated as a pellet. That’s why bones and fur are the typical components you’d find. Feathers and scales aren’t the main content of regurgitated pellets, and plant matter is usually digested rather than forming the pellet, with shell fragments not being the primary constituent.