In gecko lizards, it is common for males to exhibit larger size compared to females, along with broader and more triangular heads. Additionally, males may possess enlarged femoral pores located on the underside of their legs, which are used to release pheromones for attracting mates. In certain species, males may display vibrant or distinctive coloration, while females often exhibit more subdued colors. Another distinguishing feature of male geckos is the presence of hemipenal bulges located at the base of their tails, a characteristic absent in females. These bulges play a crucial role in the process of reproduction.