Swallowtail butterfly Swallowtail butterfly Swallowtail butterflies are large, colorful butterflies in the family Papilionidae, and include over 550 species. Though the majority are tropical, members of the family inhabit every continent except Antarctica. The family includes the largest butterflies in the world, the birdwing butterflies of the genus "Ornithoptera". Swallowtails have a number of distinctive features; for example, the papilionid caterpillar bears a repugnatorial organ called the osmeterium on its prothorax. The osmeterium normally remains hidden, but when threatened, the larva turns it outward through a transverse dorsal groove by inflating it with fluid. The forked appearance of the swallowtails' hindwings, which
Comma splice Jr. advises using a semicolon, not a comma, to join two grammatically complete clauses, except when the clauses are "very short" and "similar in form", for example: Comma splices are similar to run-on sentences, which join two independent clauses without any punctuation and without a conjunction such as "and", "but" "for", etc. Sometimes the two types of sentences are treated differently based on the presence or absence of a comma, but most writers consider the comma splice as a special type of run-on sentence. According to "Garner's Modern English Usage": Comma splices often arise when writers use conjunctive adverbs (such