The silver spotted skipper (Epargyreus clarus) is one of the most recognizable and widespread butterflies across North America. While the adults are a delightful sight fluttering through gardens and meadows, the continuation of their lifecycle hinges entirely on specific vegetation known as the silver spotted skipper host plant.
Understanding the Term: What is a Host Plant?
Before delving into the specific flora for this skipper, it is essential to understand the ecological role of a host plant. Unlike nectar plants that provide energy for adult butterflies, host plants serve as the sole nursery and food source for caterpillars. Female butterflies exhibit remarkable selectivity, chemically identifying the correct species to ensure their offspring survive the larval stage. For the silver spotted skipper, this evolutionary partnership is specific and non-negotiable.
Primary Legume Hosts: The Soybean Connection
The most famous and widely documented silver spotted skipper host plant belongs to the legume family. These butterflies have a particular affinity for plants in the genus *Desmodium*, commonly known as tick trefoil. However, the connection extends to another familiar agricultural and garden plant: soybean (*Glycine max*).
Soybean: While often viewed as a crop pest, the silver spotted skipper plays a natural role in the ecosystem. The caterpillars create nests by rolling leaves and feeding on the foliage. They typically do not consume the entire plant, and significant crop damage is usually associated with extreme population booms.
Tick Trefoil (Desmodium spp.):b: These native perennials are powerhouses in the garden. They provide excellent host material and are crucial for maintaining wild populations. Their small, purple flowers also attract a variety of beneficial pollinators.
Native Woodland and Savanna Species
In natural habitats, the silver spotted skipper relies on the structural diversity of woodlands and savannas. The caterpillars are often found on shrubs and small trees rather than low-growing herbs. Incorporating these species into a naturalized landscape is the best way to support the insect through its entire lifecycle.
Hairy Locust and Black Locust
Trees in the *Robinia* genus are vital woody hosts. The hairy locust (*Robinia hispida*) and the black locust (*Robinia pseudoacacia*) are frequently utilized. These trees offer tough, compound leaves that provide the shelter and sustenance the developing caterpillars require.
Wafer Ash and Hop Trees
Plants in the citrus family, specifically wafer ash (*Ptelea trifoliata*) and hop trees (*Ptelea trifoliata* var. *pubescens*), are also recognized hosts. These woody shrubs and small trees are particularly valuable because they maintain their structure and leaves well into the season, supporting late-stage caterpillars.
Creating a Suitable Habitat
Attracting silver spotted skippers goes beyond simply planting one host species. Gardeners and conservationists must consider the layout and protection of the area. The caterpillars require shelter from wind and predators, as well as access to sunny basking spots.
Avoid Pesticides: This cannot be overstated. Broad-spectrum insecticides will decimate not only the caterpillars but the adult population as well. Embrace organic gardening practices to allow the natural predator-prey balance to function.
Sunlight and Structure: These skippers are heliophilic, meaning they love the sun. Plant hosts in areas that receive ample direct sunlight. Leave some leaf litter and woody debris to provide the microhabitats the caterpillars seek for nesting.
