Hudson-bay
Guides
Eristalis brousii
Hourglass Drone Fly
Eristalis brousii, commonly known as the hourglass drone fly, is a hoverfly species first described by Samuel Wendell Williston in 1882. The species has experienced severe population decline across North America following the introduction of the European congener Eristalis arbustorum near Toronto around 1885. As of 2019, it persists only along the lake margin of Hudson Bay in Northern Canada, making it one of the most geographically restricted hoverflies on the continent. Like other Eristalis species, adults are pollinators while larvae develop as aquatic filter-feeders.
Papilio machaon hudsonianus
Hudsonian Old World Swallowtail
Papilio machaon hudsonianus is a subspecies of the Old World swallowtail, a large and distinctive butterfly in the family Papilionidae. It belongs to one of the most widespread and recognizable butterfly species in the Palearctic region. The subspecific designation indicates geographic differentiation within the broader P. machaon complex. Like other members of this species, it exhibits the characteristic tailed hindwings and bold yellow-and-black coloration typical of swallowtail butterflies. The subspecies was described by A. Clark in 1932 based on morphological distinctions from nominate populations.