Avoid any salty food -salted nuts, processed meats etc. Leftover roast potatoes will be snapped up, but not chips. Pastry is good, so left-over mince pies can be broken up for the bird table, and shredded marzipan and crumbled cake will be gratefully received.
Please don’t put out any fat left in the roasting tin after cooking the Christmas turkey or Boxing Day beef – cooled solidified fat, combined with meat juices, can easily smear onto a bird’s feathers and interfere with their waterproofing and insulation. One of the best ways to use mixed leftovers is to make bird cake.