Fruits like apples and pears, even when past their best, will be happily snapped up by blackbirds and thrushes. Birds can't digest salt so avoid bacon rind and salted peanuts - though plain peanuts are very acceptable to blue tits.
The bears will also make sure that the bird bath is full of clean water. They may even have to pop outside that morning and break any ice that might have formed over the top of the water - especially as the weather has been so, so freezing recently. They will draw straws to see who might have to go out into the cold.
