Macaws or otherwise, do not always persist. There are a number of factors in nature that limit the success of hybridization. One limiting factor involves coloration. Many hybrid animals are more colorful than their parents, so they stand out and become easy prey for predators. For many animals the offspring, or hybrids, produced from genetically dissimilar parents are sterile. However this is not so with Macaws. Macaw Hybrids have been traditionally bred for color. The father’s have the dominant gene, so this will generally influence the offspring’s appearance. However some say that the sex of the offspring my also influence the color, with a female offspring tending to take on the color traits of the father while the male offspring tends to take the those of the mother.