Wren

The Eurasian wren (Troglodytes troglodytes) is tiny, only the goldcrest and the firecrest are smaller among British birds, but it has an enormous voice, apparently ten times louder, weight for weight, than a cockerel.

Audio: Eurasian Wren (Troglodytes troglodytes) by Lars Edenius from xeno canto.org

Images: taken in the reserve by Cheryl Cronnie