The Yellowhammer is a member of the bunting family (a 'yellow bunting'). They usually live on farmland and heaths and feed on seeds and insects. They spread out a bit in the winter, which is probably why this one was visiting the estate. The males have an unmistakable bright yellow colour. This fellow wasn't singing, but just calling, with a single, repeating metallic 'sip'. I found him at the start of the farm walk. The song of the yellowhammer is the often quoted (but not so often heard) 'a little bit of bread and no cheese'. It is a series of high, metallic notes 'sip-ip-ip-ip-ip-ip see-u seeeee' (the bread and cheese version is easier to remember).