What is Biological pigment?
[[File:Melopsittacus undulatus.jpg|thumb|right|200px|[[Budgerigar]]s]] '''Biological pigments''' are [[pigment]]s which are chemical [[colours]]. The colours of [[plants]] and [[animals]] have various [[functions]]. [[Chlorophyll]] is the green pigment used to collect light energy for [[photosynthesis]] in plants. Many colours on plants and [[animal colour|animals]] work to change the [[behaviour]] of animals. They can be seen, and they act as a means of [[camouflage]], [[warning colouration|warning]] or attraction ([[pollination]]; [[sexual attraction|mating]]). The common dark pigment [[melanin]] often has the function of protection against [[sunlight]] ([[ultraviolet]] [[radiation]]). Pigments are different from [[structural color|structural colors]]. Pigments look the same from all angles. Structural color is the result of [[reflection]] or [[iridescence]]. For this reason, structural colors look different from different viewing angles. As an example, the [[wings]] of [[butterfly|butterflies]] commonly use structural color. {{biology-stub}} [[Category:Biology]] [[Category:Pigments]]