Evolution of human colour vision that are found between 450 and 625. Individuals with various forms of colour blindness such as deuteranopia and protanopia are missing human middle wavelength sensitive or long wavelength sensitive opsins. Their minimum wavelength differences are <5 but only at around 500. Protanopes, who are missing long wavelength sensitive cones, are unable to distinguish between colours in the green-yellow-red section of the electromagnetic spectrum. They find yellow, red and orange colours to have much lower brightness when compared to a trichromat. The dimming of these colours can result in confusion in many cases, such as when attempting to identify red traffic
Saxon Colour pigeons Saxon Colour pigeons The Saxon Colour pigeons are a group of Saxon breeds of fancy pigeons developed over many years of selective breeding. Saxon Colour pigeons, along with other varieties of domesticated pigeons, are all descendants from the rock pigeon ("Columba livia"). Saxon Colour pigeons are a combination of various varieties which are basically the same type differing only in colour and markings. Some varieties include: "Saxon Breast pigeon", "Saxon Monk" (pictured), "Saxon Priest", "Saxon Reversewing", "Saxon Shield", "Saxon Spot" and "Saxon Whitetail". Saxon Colour pigeons have similar colour varieties to the Thuringian Colour pigeons but the Saxons are all