Abstract Background Nest sanitation behavior is one of the most important means to ensure high reproductive efficiency. In avian brood parasitism. nest sanitation behavior may be a pre-adaptation of host birds that allows them to identify the parasitic eggs. so that egg discrimination behavior may have evolved from nest sanitation behavior. https://www.bekindtopets.com/special-deal-NFL-Cincinnati-Bengals-Zone-Block-Cochlear-Nucleus-6-Skin-p20556-special-save/