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Back to Top You probably observed it regurgitating or “casting” a pellet.
In North America, Barn Owls have been found to produce one to two pellets per day on average. When a prey item is swallowed whole, indigestible parts of prey, such as fur, bone, and tough insect parts, will form a pellet in a muscular area of the stomach called the gizzard. Any indigestible parts of prey such as fur and undigested bones are regurgitated as a pellet. Bones are broken down in the stomach to provide important nutrients such as calcium and phosphorus. How old are they when they have their first nest/nestlings? Doesn’t the female get hungry while she sits on the nest all day and night? It is transparent and can close and protect the eye when hunting.
Back to Top Birds have what is known as a nictitating membrane or “third eyelid.” This is a clear eyelid, closest to the eyeball. Though the owls appear to be specialized in hunting small mammals, this actually may only reflect the fact that these prey items are what the owls are most likely to encounter in their nocturnal habitat. It has not been determined whether Barn Owls are specialist or opportunistic predators. Scientists have also discovered that some species of birds can tell each other apart by smell. They have almost never been observed drinking water in the wild. However, recent research reveals that some species of birds have a high number of active genes that are associated with smell. Pellet regurgitation appears to be stimulated by the sight of a potential meal.