Earthworm Cocoon (possibly from a species of compost worm)
Scientific Name: Too generic to specify, likely various Lumbricidae or Megascolecidae species
Order & Family: Clitellata (class), Oligochaeta (subclass), Crassiclitellata (order), Lumbricidae/Megascolecidae (families)
Size: Typically 2-4 mm in length, though size can vary by species.
Natural Habitat
Moist soil, compost bins, leaf litter, and other decaying organic matter environments.
Diet & Feeding
The cocoons themselves do not 'eat'; they contain developing earthworm embryos that subsist on the yolk inside the cocoon. Adult earthworms primarily consume decaying organic matter like leaves, dead roots, and microorganisms in the soil.
Behavior Patterns
Earthworm cocoons are laid by adult earthworms. They are protective casings for developing earthworms, typically deposited in moist soil or compost. Development time varies greatly depending on species and environmental factors such as temperature and moisture, ranging from a few weeks to several months. Each cocoon can contain one to several embryos, which hatch into juvenile earthworms.
Risks & Benefits
Earthworm cocoons pose no risks to humans. They are beneficial as they represent the reproductive stage of earthworms, which are crucial for soil health. Earthworms aerate the soil, improve drainage, enrich it with their castings, and help decompose organic material, making nutrients available for plants.
Identified on: 11/13/2025