A lot of people don't like the Ring Necked Parakeets that have colonised in some areas of England because they are not native but I find them very entertaining and contrary to rumors I find they get on just fine with the smaller birds and I regularly watch them sharing the feeder with blue tits and finches. The thing that the parakeets really dislike though are the squirrels and as the picture below shows they get very cross when the squirrel hogs the feeder.
The squirrels can also be very entertaining, although, also a little annoying as they eat the bird food so quickly that it costs me a fortune keeping the feeders topped up. Luckily we only ever seem to have two or three squirrels at one time. They can be very cheeky and besides upsetting the parakeets they love to taunt the pheasants.
The squirrels aren't as bad as the young Magpies for teasing male pheasant though. They just love to try and pull out his lovely long tail feathers. The pheasant never seems to retaliate he just walks around with a Magpie hanging off his tail...very amusing...one day I will manage to catch it on camera.