As sexually dimorphic creatures, it's possible to tell the gender of brown anoles (Norops sagrei) simply by looking at them. Native to North America from Florida to southern Mexico, as well as to Cuba, the Bahamas and much of the Caribbean, these small lizards are often found at ground levels in dense, moist forests and areas of open vegetation. In the wild, these creatures can live for up to 5 years.
Several differences exist between male and female brown anoles. Measuring roughly 2 inches and weighing up to 1/3 of an ounce, males are larger than females, who measure closer to 1 1/2 inches and weigh roughly 1/6 of an ounce. While both males and female vary in patterns and colors -- usually anywhere between light gray and black -- females always have a white dorsal stripe and a dark colored triangular pattern, which males lack. Males are identifiable by their large dewlap, or throat fan, which can be extended to show its bright orange-red color. Males use this for mating displays and to defend territory from others of their gender.