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Paederus riparius


  • Adult – 5/16"–3/8". Body colour is an alternating black and red.


  • Eggs laid singly on moist substances and typically develop in 3–19 days.
  • The larvae pass through two stages before reaching adulthood.
  • Adults are most common in spring and early summer.


  • They are common in habitats with large numbers of fly larvae, e.g. decaying fruit or seaweed, compost.
  • The larvae and adults are general predators of small insects and other arthropods, including pests of crops.

Controlling Insects that attack Food Products