I live in a neighborhood in California that has a number of parrots that, presumably, escaped from captivity sometime ago and have since multiplied in number. They are all the same kind of parrot, these noisy little green guys.
In addition to the noise, these guys like to snack on my apple and persimmon trees. I've seen parrots sitting on the branches taking bites out of my apples and while I haven't seen them on my persimmon tree, now that the persimmons are starting to ripen I see bite marks in them that are identical to the bite marks in the apples.
How do I keep parrots off of my fruit trees? My first thought was to get a plastic owl but I'm uncertain if that would work. These parrots seem fearless and have skirmishes with much bigger crows all the time. (Now that is a fun scene to watch, a crow being attacked by a pack of parrots.)