The History of Lepidopterology: From 17th-Century Aurelians to Modern Backyard Butterfly Sanctuaries

The Spontaneous Generation Myth & Maria Sibylla Merian

How a 17th-century woman dismantled Aristotelian dogma with live caterpillars

Throughout the Middle Ages and early Renaissance, classical philosophy derived from Aristotle taught that insects were "beasts without souls" generated spontaneously from mud, filth, and rotting vegetation. Caterpillars were commonly associated with pestilence and witchcraft, with no recognized connection to the winged butterflies of summer.

This worldview changed permanently through the work of German naturalist and artist Maria Sibylla Merian (1647–1717). At age 13 in Frankfurt, Merian began collecting living silkworms and native garden caterpillars, feeding them fresh host plants in glass vessels and carefully recording each molt, prepupal contraction, chrysalis formation, and imago eclosion.

In 1679, Merian published "Der Raupen wunderbare Verwandlung und sonderbare Blumennahrung" (The Wondrous Transformation of Caterpillars and Their Singular Plant Nourishment). Her illustrations demonstrated not only complete metamorphosis but also the revolutionary ecological principle of host plant specificity.

The 1699 Suriname Expedition: The First Ecological Field Voyage

Crossing the Atlantic to document tropical life cycles

In 1699, at the age of 52, Merian took the unprecedented step of selling her studio and sailing with her daughter Dorothea across the Atlantic to the Dutch colony of Suriname. Unaffiliated with any royal patronage or state chartered company, this was the first purely scientific biological expedition of its kind.

For two years in the South American rainforest, Merian collected tropical larvae, reared Morpho and Heliconius butterflies from egg to adult, and observed their interactions with ants, spiders, and host vines. Her magnum opus, "Metamorphosis Insectorum Surinamensium" (1705), stunned European academia and remains one of the most celebrated achievements in the history of science.

The Society of Aurelians & 18th-Century London

The birth of organized butterfly rearing clubs and vernacular taxonomy

In 1738, a group of London naturalists, artists, and silk weavers founded the Society of Aurelians, meeting weekly at the Swan Tavern in Cornhill. The word "Aurelian" derived from "aurelia," the archaic Latin term for a golden-gilded chrysalis.

The Aurelians established standardized protocols for collecting wild larvae, constructing ventilated rearing cages with water vials, and recording emergence dates. Naturalist Moses Harris published "The Aurelian" in 1766, which popularized English common names that remain in use today: the Swallowtail, Clouded Yellow, Red Admiral, and Camberwell Beauty (Mourning Cloak).

The Victorian Era: Parlor Cabinets & Glass Bell Jars

How the Industrial Revolution sparked a nationwide obsession with natural history

During the 19th century, the rise of the Victorian middle class triggered an unprecedented surge in natural history collecting. Caterpillar hunting ("larva beating") became a prestigious hobby for families, doctors, clergy, and academics.

Specialist craftsmen produced elaborate cedar and mahogany specimen cabinets with air-tight, camphor-lined drawers to preserve dried specimens against Dermestid beetles. Rearing caterpillars on parlor sideboards was praised in educational manuals as an ideal moral and intellectual exercise for young children to observe the wonders of divine creation and biological transformation.

The 20th-Century Paradigm Shift: From Pins to Sanctuaries

Why modern butterfly keeping abandoned the net in favor of the planting trowel

By the late 20th century, habitat fragmentation, urbanization, and industrial agricultural pesticides caused dramatic declines in native Lepidoptera populations across North America and Europe.

The historical focus on catching and pinning dead specimens transformed into living habitat conservation. Organizations like the Xerces Society (founded in 1971, named after the extinct Xerces Blue butterfly) and Monarch Watch reoriented the entire hobby toward propagating native host plants (milkweeds, asters, pipevines), creating chemical-free backyard sanctuaries, and submitting non-invasive digital observations via citizen science platforms.