Answer: Fungus
Notes: Recently, the blue rock pigeon, also called Columba livia, has been linked to concerns over spreading aspergillosis disease. Aspergillosis is an infection caused by Aspergillus, a mold genus with many species. The main infection-causing species is fungus "Aspergillus fumigatus", which releases tiny airborne spores. These spores can cause respiratory illness when inhaled in large amounts, especially in people with weak immunity or lung issues. Aspergillosis is not contagious and doesn’t spread between people.
