Nonverbal communication
Like other members of the genus "Aratinga", the sun parakeet is very social and typically occurs in large flocks of 15 to 30 individuals. They rarely leave the flock, but when they get separated from the group, they squawk and scream in a high-pitched voice which can carry for hundreds of yards, allowing individuals to communicate with their flock and return to them. Flocks are relatively quiet while feeding, but are known to be very vocal and make loud noises when in flight. They can travel many miles in a single day, and they are fast, direct flyers. Nonverbal communication is also practised, with a variety of physical displays. Birds within a flock rest, feed one another, preen, and bathe throughout the daylight hours. They move through the trees using their beaks for extra support. They also have the ability to use their feet like hands to help hold, examine, or eat items. Sun conures have been reported to nest in palm cavities. When in molt, conures are uncomfortable, so are easily irritable. Bathing, warm rainfalls, and humidity allow the sheaths of each pin feather to open more easily and lessen their discomfort. Sun conures are extremely smart and curious, so require constant mental stimulation and social interaction. Their speech and ability to learn tricks in captivity are quite moderate. Otherwise, relatively little is known about their behavior in the wild, in part due to confusion with the sulphur-breasted parakeet species. Regardless, the behavior of the two is unlikely to differ to any great extent.