The wren was widely held to be sacred and killing the bird was unlucky. In Ireland it was known as the druid's bird. The hunting of the 'Cutty Wren' appears to have originated in Ireland and Wales but was also once known in Surrey and Oxfordshire. It was practised on Saint Stephens Day (Boxing Day - December 26), New Year's day or Twelfth Night.
http://www.thorshof.org/zwren.htm
Anyone heard of this tradition associated with Boxing Day?
The hunting of the wren traditionally takes place in Ireland where the wren represents the dying year King, and would be sacrificed for the good of the land. Nowadays they don’t kill a wren but a procession of Wren boys carries a decorated cage. Holly at this time of year is associated with the robin; the wren is associated with ivy.
Anyone heard of any more traditions associated with this time of year? Folklore is fascinating isn’t it and you can very often see the remnants of older customs in modern day rites!