Signs of bird flu can include a noticeable decrease in the activity level of the bird, swelling in the face of the bird, a reduction in the bird’s egg production, diarrhea, muscle paralysis, and breathing problems. Bird flu, also known as avian flu, can also cause sudden death in birds. Many birds affected by bird flu display a lack of energy or decrease in their activity level. Paired with this, there is often a decrease in appetite or lack of interest in food. One of the signs of bird flu is a bird who is acting lethargic or depressed, or being uncharacteristically quiet. Bird flu often affects poultry type birds, such as chickens, turkeys, and ducks. Signs of bird flu among poultry birds often includes swelling or discoloration of the wattles and combs of the birds. Frequently, the combs and wattles will appear to turn a bluish or purplish color. The wattles and combs may also swell and become congested. Birds showing signs of bird flu may also have similar swelling and discoloration in their legs and swelling in their faces, especially in the area under the eyes. Changes in egg production can be signs of bird flu. There may be a very sudden and dramatic decrease in overall egg production. In some cases, the reduction is less drastic but the quality of the eggs is severely compromised. The eggs are often unhealthy and have very soft shells or even no shells at all. Eggs produced by birds with signs of bird flu may also be misshapen. Diarrhea is a common symptom of bird flu. Often the fecal matter of infected birds is discolored and watery. The droppings often appear greenish in color. Breathing problems and increased nasal discharge are also signs of bird flu. Infected fecal matter or nasal discharge are two ways in which this highly contagious disease can be spread. It is very important to thoroughly disinfecting any area that previously housed infected or potentially infected birds. In flock birds, often the first signs of bird flu are widespread deaths in the flock. It is not uncommon for the disease to start slowly, with a small number of deaths over the course of a couple of days. Within days, though, deaths could become very widespread. Bird flu is highly contagious. It is possible for birds to die without ever showing signs of bird flu. If you suspect that your flock has been infected with bird flu, it is critical to contain it. This is generally done through euthanasia of birds that are sick or have been exposed to those who are sick.