One sparrow on rowan sentry duty

This bush is the gathering place of local sparrows when they are not busy making a mess in the feeders or picking fights with other birds. But when I decided to take a picture, there was just one fluffed up and grumpy looking sparrow who kept hiding behind branches so this is the best picture I could get.

I'm guessing it's not much fun to be left a lone sentry of the rowan berries.