The Black Swallowtail is seen from May to June in Canada. It is seen from June to August in the Colorado Mountains. In the eastern part of its range, it is seen from April to October and from February to October in Florida. In Arizona, it is seen from February to November. It has one brood (one group of offspring) in Canada and the Colorado Mountains. It has 2 to 3 broods in the rest of its range.