Three other visual landmarks, two accompanied by visual effects and one without sound, are even more special. (indianexpress.com)
While some studies suggest the birds rely on smells, the position of the sun, or Earth's magnetic field to navigate, scientists also know that pigeons use visual landmarks. (sciencemag.org)
May walks down the street, he can't recognize perspective lines, so heuses visual landmarks to keep his bearings. (discovermagazine.com)