Honestly, society has been trained to believe that birds are unsuspecting, unintelligent creatures.
Birds like, the pigeon, are looked upon as PESTS.

HOWEVER-

I propose a theory. These are not birds. BUT HIGHLY DISGUISED SPY CAMERAS.

BIRDS ARE NOT REAL. WATCH YOUR BACK.

ALTERNATE THEORY, BUT LESS LIKELY:

The birds work for the bourgeoisie. All the birds died in 1986 due to Reagan killing them all and replacing them with spies that are now watching us.

SOURCE: ironmouseforever on twitch

An avian veterinarian is a HIGHLY TRAINED government employed MECHANIC who is hired to keep track of these "bird" drones and their information.
WATCH OUT FOR THESE PEOPLE AS WELL.

I AM SO GLAD to see my fellow freedom-fighting Americans, protecting their privacy against these heinous drones. WATCH YOUR BACK. And watch for poop,
the bio-mechanical engineered tracking devices within the drones supposed "excrement" can track your EVERY MOVE.

WATCH. LISTEN.