Can gray swallows eat vegetables?

Gray swallows can eat vegetables.This bird's food nature is relatively mixed. You can eat plants or insects. If you raise it artificially, there are many foods you can choose. It is best to match it with feeding. You cannot only feed only one food for a long time.Usually use grains as the main feed and feed vegetables every day, but it is just a non -staple food to supplement specific nutrients and cannot use it as the main food.