(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.
Parakeets should be at least one year old before they start breeding. Your parakeets need to be in good breeding condition, too, before you breed them. This means that they are eating a well-balanced diet with plenty of fruits, veggies, and extra calcium.