(of an organism or tissue) living in the absence of air or free oxygen. pertaining to or caused by the absence of oxygen.
Parakeets can breed year round if conditions are right in their environment. Normal breeding season begins early in the year and continues until fall. It is very rare to see parakeets mating, but a male and a female must mate to keep the eggs fertile.
During the mating season, February to March, the male raccoon travels long distances and mates with many females. After a 63-day gestation period, the female has her litter, which numbers from two to six young. They find shelter in either hollow trees or dens (woodchuck burrows, culverts, under buildings).