Signs of bird flu
Birds infected with the most serious strain of bird flu, called highly pathogenic avian influenza (HPAI), usually show some (or all) of the following signs.
- sudden death
- swollen head
- closed and runny eyes
- lethargy and depression
- lying down and unresponsiveness
- lack of coordination
- eating less than usual
- lethargy
- sudden increase or decrease in water consumption
- head and body shaking
- drooping of the wings
- dragging of legs
- twisting of the head and neck
- swelling and blue discolouration of comb and wattles
- haemorrhages and redness on shanks of the legs and under the skin of the neck
- breathing difficulties such as gaping (mouth breathing), nasal snicking (coughing sound), sneezing, gurgling or rattling
- fever or noticeable increase in body temperature
- discoloured or loose watery droppings
- stop or significant drop in egg production
Some species such as ducks, geese and swans can carry the avian influenza virus and spread it without showing any signs of illness.
Birds infected with the less serious strain of bird flu, called low pathogenic avian influenza (LPAI) may not show clear signs of infection. They may have mild breathing problems. These signs can indicate bird flu, but the avian influenza virus can only be confirmed through laboratory tests.
If you are concerned about the health of your birds speak to your private vet. If you suspect bird flu, you or your vet must report it immediately to the Animal and Plant Health Agency (APHA) even if the signs are mild.