Scarlet macaws frequently use their left foot in handling food and in grasping other things. The right foot supports their body when they are using the other leg.
Scarlet macaws use a variety of harsh, loud screeching calls, guttural squawks and growls to communicate.
Scarlet macaws, like other parrot species, travel long distances in search of food.
The scarlet macaw can eat fruits that are poisonous enough to kill other animals. This could be because they also eat large amounts of clay, which is thought to neutralize plant poisons.