Sexually mature males differ from females and juveniles in appearance, and this may be the result of sexual selection.
The males have longer and deeper heads, and longer limbs when compared to females.
Females are also generally a little bit shorter in length than males.

Sexually mature males also display different coloration from females or juveniles.
The have  orange heads and black bodies, in contrast to the much more subdued coloring and yellow heads of females, juveniles, and immature males.
Males that reach sexual maturity also have enlarged testes when compared to those of males that have not done so.
Sexually mature males differ from females and juveniles in appearance, and this may be the result of sexual selection. The males have longer and deeper heads, and longer limbs when compared to females. Females are also generally a little bit shorter in length than males.
Sexually mature males also display different coloration from females or juveniles. The have  orange heads and black bodies, in contrast to the much more subdued coloring and yellow heads of females, juveniles, and immature males. Males that reach sexual maturity also have enlarged testes when compared to those of males that have not done so.
Uracentron flaviceps