Wren (Troglodytes troglodytes)
If you are familiar with its complex song full of crescendos and trills then you will often know there is a Wren around long before you see it, if you see it that is!
One of the features of the Wren from a distance is that it frequently has its tail cocked up, sadly this one did not so I can't illustrate the point.
This time of year, in amongst its time spent singing its territorial song the male Wren is busy building four or five nests. He then shows his partner around them and she will choose which one, if any, she is prepared to raise her young in. If she doesn't like any of them he is out of luck as she will be off looking at another chaps efforts!
So, spare a thought for the male Wren this time of year; life is not easy for him!