Macaws are a group of New World parrots that are long-tailed and often colorful. They are popular in aviculture or as companion parrots, although there are conservation concerns about several species in the wild.
Sometimes macaws are hybridized for the pet trade.
Aviculturists have reported an over-abundance of female blue-and-yellow macaws in captivity, which differs from the general rule with captive macaws and other parrots, where the males are more abundant. This would explain why the blue and gold is the most commonly hybridised macaw, and why the hybridising trend took hold among macaws. Common macaw hybrids include the harlequin (Ara ararauna × Ara chloroptera), miligold macaw (Ara ararauna × Ara militaris) and the Catalina (known as the rainbow in Australia, Ara ararauna × Ara macao). In addition, unusual but apparently healthy intergeneric hybrids between the hyacinth macaw and several of the larger Ara macaws have also occasionally been seen in captivity. Another, much more rare, occurrence of a second generation hybrid (F2), is the Miliquin Macaw (Harlequin and Military Macaws)