Troidini is the tribe of Aristolochia swallowtails that includes the genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 Battus

Battus (butterfly)

Battus is a New World genus of butterflies that are usually found around pipevine plants. The caterpillars feed off the poisonous pipevines, making the insects poisonous themselves; they taste very bad to ward off predators. Since birds avoid these butterflies, other swallowtail species mimic...

.

It consists of some 135 species worldwide and 3 species that occur North America. Members of this tribe feed on poisonous pipevine plants (genus Aristolochia

Aristolochia

Aristolochia is a large plant genus with over 500 species. Collectively known as birthworts, pipevines or Dutchman's pipes, they are the namesake of the family . They are widespread and occur in the most diverse climates. Some species, like A. utriformis and A...

). As a result, they are poisonous themselves, taste extremely bad to predators (Pinheiro 1986), and are mimic

Mimic

In evolutionary biology, mimicry is the similarity of one species to another which protects one or both. This similarity can be in appearance, behaviour, sound, scent and even location, with the mimics found in similar places to their models....

ked by other butterflies (Scott 1986).