Rejection winds into a ball
The balls of rejection are balls rejected by the Oiseaux Rapace S as well as the corvidés , the laridés and much of other birds. They contain the hard and not digested elements Proie S that they avalent in entirety, like the Poil S, the Os, or even the Arête S of fish introduced with regard to the Martins-fishermen.
They are rejected by the Bec approximately 2 hours after Ingestion of the Proie S. One finds these balls close to the Nid or the perch of the Oiseaux. With regard to the night Raptor S, accumulations are often in the old barns or with the foot of a bell-tower.
Analyzes balls
Their Dissection makes it possible to know the food mode of the Oiseau: thus, one finds with the menu of the raptors of the Rongeurs and the Squamates. The fine analysis of these balls even makes it possible to identify the Espèce S of the birds of prey: the night ones, whose gastric juices are less powerful, have balls in which the skeletons are complete. The diurnal ones reject primarily balls in agglomerated hairs.
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