A small brown bird, the Wren, also called Eurasian Wren, is common but secretive, foraging for insects in the undergrowth.
Shown here with characteristic upturned tail. It is native to most of Europe, part of North Africa and part of Asia.
It is not Britain's/Europe's smallest bird, - see Goldcrest link below.
Tail up
Dishevelled
Recomposed
Insectivorous, Wrens will eat spiders' webs in winter when insects are in short supply.