The male Dunnock whose territory includes our back garden also has a busy life. Perching on the hedge near the bird table he regularly makes his wing-raising display to the female who perches next to him.
A few minutes later, down at the end of the garden, again from a perch next to his female on top of the hawthorn hedge, he gives his jingling song. Another dunnock answers from next door's garden.
He needs to be watchful; it has been observed that male dunnocks from adjacent territories will mate with the resident female when they get the chance. The interloper gets some encouragment from the female; the advantage for her is that she gets a variety of genes in one clutch of offspring. The resident male always has the chance to sneak off and mate with the female next door.
The dunnock is a little brown bird with a colourful private life. As I stand by the pond watching them there's a burst of white wing-bars as a colourful male Chaffinch flies into the garden. Taking the country as a whole it's one of our commonest, if not the most common bird. But it's still a welcome sight.