Since the pigeons can find their way home even when wearing frosted eyeglasses, researchers believe that they calculate their position in relation to home by detecting the directions from which they receive important navigational information.
Kuna tuvid suudavad leida kodutee üles ka siis, kui neile on pandud silme ette matistatud pinnaga läätsed, arvavad teadlased, et linnud arvestavad välja oma asukoha kodupaiga suhtes tänu eri suundadest saadavale navigatsiooniinfole.