What are the features of the sense organs in birds?

Birds have a very weak sense of smell. In many species, it is not developed at all. But they have excellent hearing, allowing them to distinguish sounds within a radius of several hundred meters. And even better, birds have developed vision. According to scientists, birds see better than humans 100 times or more. Birds have color vision, and are able to see a clear outline of objects sweeping past them at very high speed. Also, almost all of them perfectly see what is from them at a very great distance. As, for example, kites see a small mouse when they fly several kilometers above the ground.