Definition
"Blue-belly" is a common name for certain *Sceloporus* lizards, particularly males, that have bright blue patches on their bellies. They are typically found in western North America. The blue coloration serves as a visual signal. It is used for attracting mates and defending territory. These lizards are ectothermic. They rely on external heat sources. Think of them as the peacocks of the lizard world, showcasing their vibrant colors. Their coloration is a critical aspect of their social behavior.