There is one common food in particular that should NEVER make its way into your bird’s food bowl. The avocado. All parts of the avocado should be considered harmful to your bird: the leaves, skin, pit, and the creamy inside.
Avocados contain persin, a fungicidal toxin. If ingested, symptoms may include: increased heart rate, labored breathing, weakness, and apathy. If you think your bird has eaten avocado, contact your avian vet immediately.
While many people have fed avocado, or have seen wild flocks of parrots enjoying them from yards with no ill effects, it is better to be safe than sorry. Keep avocados, as well as guacamole, out of the reach of your bird.