Park in a closed garage.
Birds such as budgerigars and parrots can benefit from the addition of stimulating accessories to their cages. Small toys such as bells and mirrors can keep birds occupied, and the PetSmart website even has complete activity centres available.
You can try using visual deterrents like reflective objects, as birds dislike shiny surfaces. You can also cover the cars with a tarp or park them under a shelter to minimize exposure to birds. Lastly, regularly washing the cars can help prevent bird droppings from damaging the paint.
The driver's sideview mirror on my 2002 Sequoia started "buzzing" and I discovered that the only way to stop is was to hold the button halfway down that folds the mirrors inward. I used a toothpick as a wedge to keep the button in the halfway down position. I have scheduled an appointment to have the mirror control button assembly replaced. The cost of the part alone is about $150.00.
Birds are covered in feathers
No, birds will just land on it.
Heated mirrors that are attached to your doors. "Door" simply tells you where the mirrors are located. As opposed to the inside "rear view mirror".With heated outside mirrors it will keep condensation and snow from building up on the mirror and you not being able to see next to you.
You can keep birds from getting trapped in bird netting by removing the netting or using a color of netting that the birds can see.
garage
Possibly you meant "How do the birds keep warm . . ."? As for why they keep themselves warm, it is to stay alive.
budgies
You definitely have a point... Usually left mirror show direct image when right mirror do what you said. If you want to keep the car you will have to remember all the time about the mirrors. Usually it takes couple weeks to adapt. Unless you driving other cars too.
You can keep myna birds, parrots, canary, finches, caiques, and quite a few others.