Silverfish
Lepisma saccharina · Insect, Invertebrate, Cold-blooded, Wild
Animal Family
Lepismatidae, order Zygentoma, class Insecta
Animal Category
Insect/Arthropod
Breed / Variety
Common Silverfish
Conservation Status
Least Concern, population trend stable, considered a common household pest rather than a conservation concern.
About This Creature
Small, wingless insect typically 1/2 to 1 inch long. Carrot-shaped, flattened body tapering toward the rear, covered in tiny metallic silver-grey scales that give it a fish-like shimmering appearance and movement.
Physical Characteristics
Three long caudal filaments (cerci) extending from the rear, two long antennae on the head, compound eyes are small and widely separated, six legs adapted for swift running rather than jumping.
Behavior & Temperament
Nocturnal and secretive, avoids light, moves with a darting, fish-like slithering motion, highly agile, solitary but congregates where moisture and food are abundant.
Habitat & Diet
Origin Region
Originally native to the tropics of Europe and Asia, now cosmopolitan and found worldwide in human habitations.
Habitat
Urban/Suburban, dark, damp areas such as basements, bathrooms, kitchens, and attics. Terrestrial.
Diet & Nutrition
Omnivorous scavenger, feeds on carbohydrates, starches, sugars, paper, glue, book bindings, photos, sugar, hair, dandruff, and clothing fabrics like cotton and silk.
Lifespan & Health
Lifespan ranges from 2 to 8 years, unusually long-lived for an insect. Preyed upon by spiders, centipedes, and earwigs. High reproductive rate under favorable humid conditions.
Special Characteristics
Can survive for months without food if water is available, highly resilient ancient insect lineage dating back over 300 million years before trees evolved.
Ecological Information
Acts as a minor scavenger in natural forest leaf litter and soil ecosystems, though primarily viewed as a nuisance pest in human dwellings due to damage to books and stored materials.