With many of the high nesting sites gone, some macaws roost lower, and the babies are then subject to predation by animals which would not normally be able to get to the babies. Macaws in the wild do not have a high reproductive rate, because of the time it takes to raise a baby. The loss of one baby really has an impact. Hyacinth Macaws have run into trouble because they are specialized feeders, and the palm trees which they feed on are being destroyed. Scarlet Macaws and Red Fronted Macaws are also on the endangered list.
Some macaws are nearly extinct.
The Spix's Macaw has only seven surviving in captivity, with one wild bird left. Please be aware of this, and make sure you have a domestic baby, because if it's not, it's very likely smuggled. Smuggling is a problem with the Red-Fronted Macaw. Here in Maryland, where I live, everything tends to be on the expensive side, including birds. Macaws are incredible shriekers, screamers, and callers.