Called also neonate and newborn. premature infant (preterm infant) one born before a gestational age of 37 completed weeks (259 days). The duration of gestation is measured from the first day of the last menstrual period and is expressed in completed days or weeks.
Stress. The second most common reason that parrots pluck their feathers is stress. Parrots can become stressed because of lack of attention from their owners, dirty or cramped accommodations, and boredom.According to veterinarian Ron Hines, Some birds literally groom their feathers off for lack of other pastimes..tress. The second most common reason that parrots pluck their feathers is stress. Parrots can become stressed because of lack of attention from their owners, dirty or cramped accommodations, and boredom. According to veterinarian Ron Hines, Some birds literally groom their feathers off for lack of other pastimes..
Tail feathers are balanced left and right of the center. Flight feathers have a wider and narrower side. This makes them better for flying because they can cut through the air with very little resistance (also called drag). Other types of feathers are made for use on the body of the bird. The downy feathers that are good for warmth are shown on the far right. Semiplume feathers also help to keep birds warm and they help water birds float. The bristle feathers are found around the eyes and nostrils, and for some birds that like to catch flying insects they can be seen around their mouths.