The fifth coin in the Royal Canadian Mint's Butterfly series, this 50-cent sterling silver coin celebrates the Short-tailed Swallowtail. True to its name, this resilient butterfly is distinguished by tails that are notably shorter and wings that are stubbier and more rounded than those of other swallowtail species. Its velvety black wings are edged with rows of yellow spots touched with warm orange accents, anchored by a reddish-orange eyespot on each hindwing.

Spanning the Maritimes, eastern Quebec, and Newfoundland and Labrador, the Short-tailed Swallowtail is renowned for its strong flight against stiff ocean breezes., This coastal butterfly frequents not only lush gardens, but also rugged sea cliffs, rocky shores, and windswept alpine zones above the tree line.