Giant Swallowtail and Black Swallowtail in Our Butterfly Gardens TodayButterflies, Butterfly Gardening, General, Uncategorized / August 20, 2021 August 21, 2021 Giant swallowtail and Black swallowtail butterflies and other butterflies are in our butterfly gardens today. Thank you for your love, Nature! Here are some beautiful blossoms in our August butterfly gardens.