Eurasian Wren

Troglodytes troglodytes

Widespread & abundant residents with 8 million breeding pairs in Britain plus 6 million birds in Ireland in woodland with dense undergrowth.

Also breeds in mainland Europe.

Adults are rufous brown above, greyer beneath, and indistinctly barred with darker brown and grey, even on the wings and tail.

Juveniles have less distinctly barred and have mottled underparts.

The most common call is a sharp, repeated "tic-tic-tic", similar but faster and with less isolated notes compared to that of a Robin. 

The song begins with a few preliminary notes, then runs into a trill, slightly ascending, and ends in full clear notes or another trill.