You really should not add sugar. Only some birds are adapted to processing Food with high sugar content like nectar and fruits such as hummers and orioles. That said the recipe in this article has 1/2 of sugar to 8 cups of other ok bird foods. So it's essentially 1/16 a cup of sugar per cup, which, not optimal,isn't a terrible amount either.
You really should not add sugar. Only some birds are adapted to processing Food with high sugar content like nectar and fruits such as hummers and orioles. That said the recipe in this article has 1/2 of sugar to 8 cups of other ok bird foods. So it's essentially 1/16 a cup of sugar per cup, which, not optimal,isn't a terrible amount either.