Milkweed-bugs

Guides

• Lygaeidae

  seed bugs, milkweed bugs, ground bugs

  Lygaeidae is a family of true bugs (Hemiptera: Heteroptera) commonly known as seed bugs, milkweed bugs, or ground bugs. The family currently comprises approximately 60 genera in six subfamilies, though it was formerly much larger before numerous subfamilies were elevated to independent family status. Members are distributed worldwide and exhibit diverse feeding habits, with many species feeding on seeds, some on sap or seed pods, others being omnivores, and a few being insectivores. Several genera, including Lygaeus and Oncopeltus, are well-known for their association with milkweeds and their bright aposematic coloration.

  Hemipteratrue-bugsseed-bugsmilkweed-bugsagricultural-pestsaposematic-colorationincomplete-metamorphosisworldwide-distributionseed-predationchemical-defense-sequestration

• Lygaeinae

  Lygaeinae is a subfamily of ground bugs (Hemiptera: Lygaeidae) commonly known as milkweed bugs. Members are characterized by ancestral adaptations for sequestering cardenolides—potent cardiac glycosides from host plants—using resistant Na+/K+-ATPases. These coevolved traits enable chemical defense against predators and have facilitated host shifts to cardenolide-producing plants across multiple families. The subfamily exhibits diverse feeding strategies from dietary specialists to generalists, with sequestration mediating predator-prey interactions with vertebrates and invertebrates.

  chemical-defensecardenolide-sequestrationaposematic-colorationNa+/K+-ATPase-resistancehost-plant-specializationpredator-prey-interactionsmilkweed-bugs