This species can be found in the island of Jamaica and the population is small. This swallowtail favors mountain slopes at heights of 500 to 2000 feet (152.4-609.6m).
The Homerus Swallowtail is the largest species in its genus, with a forewing size of 3 inches (75mm). It is usually dark colored and with yellow and blue bands and spots. The males have hair scales on its hindwings near the abdomen. The Homerus swallowtail flies slow and is very powerful.
The adults eat nectar from many flowers.
The Homerus swallowtail flies in the daytime from February to April and September to October.
The major threat for the Homerus swallowtail is the deterioration of its habitat. Another threat are commercial collectors. To save this swallowtail, a Jamaican Mountain National Park may be established and the swallowtail may also become the national butterfly of Jamaica. There is also captive breeding to diminish the collection of the wild swallowtails.