(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.
The mating season for raccoons differs due to their location. Typically between the months of January and March, the female is in heat for 3 or 4 days. Males roam their home area in search of females to mate with. The act of mating includes a period of foreplay and can last for more than an hour at a time.