Dimorphism refers to the occurrence of two distinct forms or types within a species. This phenomenon can be observed in various organisms, including plants and animals. For example, in some species of butterflies, males and females exhibit different colors or patterns, which can help in attracting mates or avoiding predators. In addition to physical differences, dimorphism can also manifest in size or behavior. In birds, male and female individuals may differ in size, with males often being larger or more colorful. Such variations can play a crucial role in reproduction and survival, influencing mating strategies and ecological interactions.