Over the last few days I have been getting brown birds in my garden. They mainly just roost/sit in the trees or feed on berries in the shrubs. They also try to scare off other birds that join them on the shrubs for berries. They are about the size of a blackbird in height but a fair bit fatter. There seems to be a small group of about half a dozen. I have never seen them before and would like to know what they are.