Dr. Universe: How Can A Regular Person Make A Big Difference In Society? They need nectar plants to eat. Those host plants may be different from their nectar plants. Sincerely,Dr. UniverseAsk Dr. Universe is a science-education project from Washington State University. Or you can write to: Ask Dr. Universe Washington State University ITB 2013B Pullman, WA 99164This is Fender’s Blue.