Green Aracari chicks hatch after an incubation period of approximately 16 days, which is notably shorter than many psittacine species and reflects the ramphastid family's relatively rapid early development. The newly emerged chick is altricial, hatching blind, naked, and entirely helpless. Hatchlings typically weigh between 6 and 8 grams, making them exceptionally small and fragile. The skin is translucent and pinkish, with no visible down, and the oversized bill is soft and pliable, bearing little resemblance to the strikingly patterned adult bill that will develop over the coming months.
In a parent-raised setting, the adult pair will begin feeding the chick within the first few hours after hatching. Green Aracaris are cooperative breeders in the wild, and in captive breeding situations both the cock and hen typically share feeding duties from the outset. The first meals consist of regurgitated fruit pulp and partially digested insects, providing the chick with easily absorbed nutrients and the microbial flora necessary to establish a functional digestive tract. The parents instinctively regulate portion size based on the chick's tiny crop capacity.
For hand-raised chicks, the first feeding should be delayed until the yolk sac has been fully absorbed, generally within eight to twelve hours post-hatch. Attempting to feed before yolk absorption is complete can overwhelm the chick's immature digestive system and lead to crop stasis or bacterial infection. The initial hand-feeding should consist of a thin, well-hydrated preparation of a commercial low-iron softbill or toucan-specific hand-rearing formula, offered at a temperature between 102 and 106 degrees Fahrenheit.
During this critical first day, the brooder environment must be meticulously controlled. Temperatures should remain between 95 and 97 degrees Fahrenheit with humidity held at 60 to 65 percent. The chick should be placed on a soft, non-fibrous substrate such as paper towels layered over a padded surface. Observe the hatchling closely for steady respiration, a responsive feeding reflex when the bill margin is gently stimulated, and pinkish skin coloration. Any cyanotic tinge, gasping, or complete absence of feeding response warrants immediate contact with an avian veterinarian experienced with ramphastids.