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.spidertattooz.com/Tumma-figaro-kaulaketju-teras-kaulakoru-8mm-55cm/