Permo-Triassic

The Permian is the ancient time in which the ancestors of lacewings already lived, a reference that gives a present-day garden predator a lineage extending across geological ages. In Silent Spring, that deep past sharpens the contrast between enduring natural relationships and the rapid changes imposed on living landscapes.

The Permian in Deep Time

The book places the lacewing’s ancestry in the Permian, describing it as a member of an ancient race. Its adult feeds mostly on plant nectars and aphid honeydew; when it lays eggs, each is fastened to a leaf at the end of a long stalk. The specific image connects geological antiquity to a small, observable detail of insect life.

Predation Across Generations

The Permian reference occurs within a description of predators and parasites active in fields, hedgerows, gardens, and forests. Above a pond, dragonflies catch mosquitoes in flight; below the water, their nymphs prey on mosquito larvae and other insects. Alongside them, the lacewing’s life cycle and feeding habits show predation operating across habitats and stages of life. Deep time thus frames the present as part of a continuing web of ecological relations, rather than a collection of isolated species.

Contrast with Managed Landscapes

Elsewhere, the book describes western sage country as a landscape shaped over millions of years, where plants and animals evolved in relation to harsh climatic conditions. It warns that efforts to replace sage with grass can disrupt this established system: spraying may eliminate plants beyond its intended targets, as when willows were killed along with sagebrush in the Bridger National Forest. Against such abrupt intervention, the Permian lineage of the lacewing serves as a measure of the long histories embodied in ordinary living organisms. The reference supports the book’s attention to ecological continuity, not a claim that any particular Permian species survives unchanged today.