Mike Read / Eurasian treecreeper (Certhia familiaris) on Alder trunk. Beside Robin's Hide, Langford Lakes Nature Reserve, Steeple Langford, Wiltshire, England, UK. February.

Markus Varesvuo / Treecreeper (Certhia familiaris) on tree trunk, portrait. Haukipudas, Oulu, Finland. January.

Markus Varesvuo / Treecreeper (Certhia familiaris) on snow covered tree trunk. Haukipudas, Oulu, Finland. January.

Markus Varesvuo / Treecreeper (Certhia familiaris) on tree trunk. Haukipudas, Oulu, Finland. January.

Markus Varesvuo / Treecreeper (Certhia familiaris) on tree trunk. Haukipudas, Oulu, Finland. January.

Bruno D'Amicis / Treecreeper (Certhia familiaris) returning to nest built under bark of dead old-growth Beech (Fagus sylvatica) forest tree, Abruzzo, Lazio and Molise National Park / Parco Nazionale d'Abruzzo, Laz...

Bruno D'Amicis / Treecreeper (Certhia familiaris) returning to nest built under bark of dead old-growth Beech (Fagus sylvatica) forest tree, Abruzzo, Lazio and Molise National Park / Parco Nazionale d'Abruzzo, Laz...

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

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

Fabrice Cahez / Eurasian treecreeper (Certhia familiaris) carrying invertebrate prey, to nest in tree trunk, Vosges, France, May.

Fabrice Cahez / Eurasian treecreeper (Certhia familiaris) carrying invertebrate prey to nest in tree trunk, Vosges, France, April.

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