I'm sure bird viruses are spread by well meaning bird feeders of the human kind who just didn't bother to clean their feeders regularly . I know that I would have no woodpecker in my garden if food was not there for them. There are certain foods that are not suitable at certain times of the year. Especially at nesting time for instance dried fruits and mealworm need to be soaked properly before being put out as they can swell inside their tiny tummies and cause deaths . Fats can go rancid in the summer sun. White bread has no real nutritional value to chicks.
I feed lightly in spring summer and autumn but make sure there is plenty at all times in the winter.
I feed lightly in spring summer and autumn but make sure there is plenty at all times in the winter.