The juvenile stage of a Nanday Conure begins around the time of weaning, typically between seven and ten weeks of age, and extends through the first year or so of life. During this period, the bird undergoes significant physical maturation. The full adult plumage fills in, with the vibrant green body feathers becoming richer and the distinctive black head, blue flight feathers, and red thigh patches reaching their final coloration. The bird reaches its adult length of approximately 11 to 12 inches and achieves its full adult weight, generally between 120 and 150 grams.
Bone and muscle development continue throughout the juvenile period even after the bird appears fully feathered. The skeletal system is still hardening, and the flight muscles are strengthening with each day of exercise. Providing ample space for wing flapping, climbing, and short flights within a safe indoor environment is essential for proper musculoskeletal development. Birds that are confined to small cages during this period may develop weak chest muscles and poor coordination that can be difficult to correct later.
The beak and nails grow continuously and may require occasional attention during the juvenile stage. Providing a variety of textured perches, mineral blocks, and chew toys helps keep the beak naturally conditioned. The juvenile molt, during which baby feathers are gradually replaced by adult plumage, typically occurs during this stage and can span several months. During molting, the bird may appear slightly disheveled and may be more irritable than usual due to the discomfort of incoming pin feathers.
Regular weigh-ins remain important during the juvenile stage, though the frequency can be reduced from daily to weekly once the bird is fully weaned and maintaining a stable weight. Sudden weight fluctuations during this period may indicate illness, stress, or dietary inadequacy. A growth chart kept from the chick stage through the juvenile period provides valuable data for both the owner and the avian veterinarian.