Which term describes regurgitated indigestible material expelled by birds?

• A. Casting
• B. Pellets
• C. Droppings
• D. Feather

Answer: (A)

Birds of prey regurgitate indigestible parts of their prey as a mass. That expelled mass is commonly called a cast, or pellet, with “casting” being a term often used in falconry and raptor studies to describe the action and the mass that’s regurgitated. So the term casting fits the description of the regurgitated indigestible material that birds expel.

Droppings are the solid and liquid waste excreted through the cloaca, not regurgitated material. A feather is not the regurgitated mass. While pellets describe the same substance in general terms, the wording here aligns with the term casting as the specific label for the expelled mass in many practice contexts.