Like other parrots, the macaws have a four-toed food, two toes facing to the front and two to the rear. The claws are strong and pointed, made of the same material as the beak. In battle the claws are used as weapons very effectively. Claws may be grayish black or beige. The disposition of the birds varies from individual to individual and not as a function of species.
Some macaws can be quite aggressive, but the majority are docile creatures.
The point here is that no one group of macaws is more gentle or more aggressive than any other group. Do not listen to people who label one species gentle and another nasty. The labelers have not had ample experience handling macaws or they would refrain from such labeling. This is a conservative estimate, but the stories about macaws living to 100 years is floating around the bird world. A 60 year old macaw is an old bird.