(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.
â¢ Mating season is February to early April. â¢ Geese will find a new mate if the mate is killed or dies. â¢ Geese return to the area of their birth each year to mate. and nest.