All birds can have seizures. There are a number of reasons why they occur. Seizures can be caused by medical problems such as a tumor, infection, heatstroke, toxins, nutritional deficiences, injuries and more. When the cause is unknown the seizure is referred to as idiopathic. Seizures generally last about 5-20 seconds, they just seem longer. If your bird has a seizure, have your vet examine him/her ASAP to determine the cause.