(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 pika first mates about one month before the snow starts to melt. Mating season typically runs from late April to early July. The female gives birth to two to four babies in the spring. The babies are weaned in about three to four weeks. The babies will leave their mother after four weeks and are adult size in about three months. The female may then mate again and have a second litter. Behavior The American pika is diurnal, or active in the day. It spends most of the day foraging for food; guarding their territory; watching for predators like eagles, hawks, coyotes, bobcats, foxes, and weasels and sunning itself on the rocks. The pika is very vocal animal. It uses both call and song vocalizations.