Konrad Wothe / Pair of European nuthatches (Sitta europaea) mating, Bavaria, Germany, April.

Alan Murphy/ BIA / White-breasted Nuthatch (Sitta carolinensis), Arizona

Donald M. Jones / Red-breasted Nuthatch (Sitta canadensis) chick in nest cavity, western Montana

Donald M. Jones / Red-breasted Nuthatch (Sitta canadensis), western Montana

Pål Hermansen,Pal Hermansen / Nuthatch (Sitta europaea) chasing away and Black tit (Periparus ater) in car graveyard, Varmland, Sweden, December

Donald M. Jones / Red-breasted Nuthatch (Sitta canadensis), North America

Donald M. Jones / Red-breasted Nuthatch (Sitta canadensis) perching on pine cones, North America

Andrew Parkinson / Nuthatch (Sitta europaea) decending the trunk of Silver Birch (Betula verrucsa) tree, Derbyshire, UK. December (non-ex)

Paul Hobson / Nuthatch (Sitta europaea) in flight, and preparing to land, South Yorkshire, England, UK. March.

Peter Lewis / Nuthatch (Sitta europaea) perching on moss covered tree trunk, New Forest, Hampshire, England

Roger Powell / European nuthatch {Sitta europaea} with bark in beak whilst searching for grubs on surface of tree trunk, Northumberland, UK

David Tipling / Garden birds including Blue Tits {Parus caeruleus} + Nuthatch {Sitta europaea} on bird table, UK.