Barn owls are nocturnal predators that rely on both vision and hearing for survival. The optic tectum of barn owls. a midbrain structure involved in selective attention. has been used as a model for studying visual- auditory integration at the neuronal level. https://www.bekindtopets.com/flash-offer-Omnipure-Inline-K2533-JJ-GAC-Postfilter-10-x-2-Filter-1-4-Quick-Connect-save-extra/