Main zoonosis transmitted by birds:
Bacterial zoonosis
Psittacosis
- infectious agent: a bacteria: Chlamydia psittaci. Birds, especially psittacine birds: parrots and parakeets.
- animal disease: flu-like symptoms, pneumonia, septicemia, death

source http://lepigeonmasfiwi.blogspot.fr
- Mean of contamination:
- inhalation of dust from feathers or droppings
- by direct contact with secretions oculo-nasal (including the beak to mouth by owners)
- human disease :
- flu-like symptoms, pneumonia
- hyperthermia, weakness, joint pain, ocular or neurological disorders
Fungal zoonosis
Aspergillosis
It's not really a zoonosis, but the infection of birds and human by a mould caused by excessive humidity in the bird environnement.
- infectious agent: a soil pathognenic fungus: Aspergillus fulmigatus. Birds, especially parrots, pigeons, mynahs
- animal disease: a loss of voice, breathing difficulties, weakness, greenish diarrhea

source https://www.merckvetmanual.com
- mean of contamination:
- inhalation of contaminated dust
- human disease :
- chronic respiratory disease: potential risk in humans carrying a respiratory weakness