Wren

Troglodytes troglodytes

Wren Wren
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.
Not Britain's/Europe's smallest bird, -- see Goldcrest link below.  Wrens will eat spiders' webs in winter when insects are in short supply.
Wren
 		 Dishevelled wren
Dishevelled		 Wren
Recomposed
Wren calling
 		 Wren
The Wren has a remarkably loud voice for its size		 Wren singing
and uses it to call for a mate and to warn of danger
Wren catching hoverfly
 Wren catching hoverfly		 Wren with fly
Wren with hoverfly		 Wren hunting beetle
Wren hunting beetle (the shiny thing top left)
Wren with hair
 Wren with upturned tail again (and small hair in beak for nest)		 Wren tail
and again		 Wren and Dunnock
Wren and Dunnock size comparison

 Links:

Goldcrest
Size comparison to Goldcrest		 Santa
Wrens Nesting		 more wrens
More Wrens