These are generally small passerines, who are adapted to feeding on the sides of trees (Nuthatch & Treecreepers) or rocks (Wallcreeper) picking small insects out of cracks.
No. of species recorded in the UK: 5
No of species photographed: 1
Below are my photographs of Nuthatch & Treecreepers photographed in the UK, listed in systematic order.
TREECREEPER
 
         
     
                                       
                                       
                                       
                                       
                                       
                                       
                                       
                                       
                                      