Their coloration and markings can vary considerably. Symptoms include shortness of breath, rapid breathing, and bluish skin coloration. It is used alongside other forms of camouflage including colour matching and disruptive coloration. Pelargonidin is the predominant pigment causing the red coloration in the spathes. The two sexes do not differ in coloration or markings. Insects display a wide variety of sexual dimorphism between taxa including size, ornamentation and coloration. The venous type results in swelling, pain, and possibly a bluish coloration of the arm. This species exhibits countershading, with brilliant metallic blue coloration dorsally and white ventrally. Dimorphism can also take the form of differences in coloration. Their bold black and white coloration makes their appearance memorable. Snakes have a wide diversity of skin coloration patterns. Camouflage delays recognition through coloration, shape, and pattern. For example, the coral snake exhibits aposematic coloration that can be mimicked. Populations vary in antler shape and size, body size, coloration and mating behavior. The species vary considerably in coloration and size.