 When one species has its dewlap color modified to resemble the other, only a relatively minor or no increase in aggression occurs, indicating that they still can separate each other.Several other Iguania genera, "Draco", "Otocryptis", "Polychrus", "Sarada" and "Sitana", have evolved relatively large, movable dewlaps independently of the anoles.In some anoles the sexes are very similar and difficult to separated under normal viewing conditions, but most species exhibit clear sexual dimorphism, which allows one to fairly easily discern between adult males and females.