David Tipling / Eurasian treecreeper (Certhia familiaris) Forsinaird RSPB Reserve, Scotland, UK. May.

Andy Trowbridge / Common Treecreeper (Certhia familiaris) on tree trunk. Norway, March.

Dave Bevan / Pair of Eurasian treecreepers (Certhia familiaris) feeding young in a nest crevice, Carmarthenshire, Wales, UK. May.

Dave Bevan / Eurasian treecreeper (Certhia familiaris) feeding young in a nest crevice, Carmarthenshire, Wales, UK. May.

Dave Bevan / Eurasian treecreeper (Certhia familiaris) feeding young in a nest crevice, removes a faecal sac, Carmarthenshire, Wales, UK. May.

Erlend Haarberg / Eurasian treecreeper (Certhia familiaris) on tree trunk, Klaebu, Sor-Trondelag. Norway, February.

Erlend Haarberg / Eurasian treecreeper (Certhia familiaris) on tree trunk, Klaebu, Sor-Trondelag. Norway, February.

Markus Varesvuo / Treecreeper (Certhia familiaris) flying to tree, Uto, Finland, October.

Andres M. Dominguez / Common treecreeper (Certhia familiaris) on tree trunk, Ordesa y Monte Perdido Natural, , Huesca, Spain

Markus Varesvuo / Treecreeper (Certhia familiaris) on tree trunk, Uto, Finland, October.

Jussi Murtosaari / Eurasian treecreeper (Certhia familiaris) Rovaniemi, Lappi / Lapland, Finland. January

Jussi Murtosaari / Eurasian treecreeper (Certhia familiaris) Uto, Korppoo, Parainen / Lansi-Turunmaa, Lounais-Suomi, Varsinais-Suomi / Southwestern Finland, Finland. February