Fauna
Insect

Small Milkweed Bug

Lygaeus kalmii

Also known as Common Milkweed Bug, Kalm's Milkweed Bug

Small milkweed bugs sport a vibrant red and black pattern featuring a characteristic black X across their closed wings. Adults feed primarily on milkweed seeds, nectar, and dead insects, sequestering toxic cardiac glycosides that render them unpalatable to birds. During late autumn, adults seek shelter under leaf litter or plant debris to overwinter before emerging to breed in spring.

InsectsAposematicSeed Bug
Small Milkweed Bug reference1 / 7
(c) Tyler Bishop, some rights reserved (CC BY), uploaded by Tyler Bishop · cc-by
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Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Key facts
Diet & preyMilkweed Seeds, Floral Nectar, Dead Insects
Predators
  • Praying Mantises
  • Spiders
  • Assassin Bugs
ThreatsHabitat destruction, pesticide spraying, destruction of native milkweeds
HabitatsMeadows, prairies, pastures, roadsides, milkweed patches
Life span4–8 months
Classification
  1. FamilyLygaeidae
  2. SpeciesLygaeus kalmii
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Safe to observe at a normal distance.
Responsible observation
  • Observation: Look closely at mature milkweed seed pods in late summer where feeding groups gather.
  • Identification: Distinguish from large milkweed bugs by the distinct black X pattern across closed wings.
  • Handling: Gently turn milkweed leaves to inspect bugs without disturbing their activity.
Related species
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