Parasitic Problems

Avian parasites can be broadly divided into two categories: those that live on te bird and those found inside the body. Most mites and lice come into the former group, with the exception of air-sac mites, which live in the bird's respiratory system. You are likely to notice the signs of these parasites at dusk. Affected individuals will wheeze, and may later show respiratory distress after mild exercise. Ivermectin, a drug that is absorbed through the skin, is now used to treat this and other ailments.
In their effects, the most noticeable mites are scaly-face mites (Knemidocoptes)- a scourge of Budgerigars in particular.

Starting as snail-like tracts across the upper bill, the infection proceeds to form coral-like encrustations, which may spread right around the beak and eyes. You should remove affected birds immediately from the aviary. Proprietary remedies are readily available from pet stores.
Some mites are not host-specific, and red mites (Dermanyssus gallinae) represents a potential hazard to all bird-keepers. Under favorable conditions, numbers build up rapidly and, in a heavy infestation, chicks will become anemic. There is also the risk that red mites will transmit microscopic blood parasites will transmit microscopic blood parasites when they feed, weakening birds still further. Treat all new arrivals with a special avian spray.

Intestinal roundworms(Ascaridia) are a problem particularly associated with Australian parakeets and Cockatiels.This can be related to their feeding habits, since they tend to seek their food on the ground where it may have become contaminated.

Make every effort to eliminate these parasites before you release the birds into your aviary. You can gie suitable medication either in soft food or water, although the bitter taste of the drug may deter the birds from drinking.