Fauna
Insect

European Firebug

Pyrrhocoris apterus

Also known as Firebug, Red Soldier Bug, Linden Bug

European firebugs gather in dense, sun-drenched clusters along the base of linden trees and mallow stems, forming vibrant patches of crimson and black. Their bold, mask-like patterns serve as aposematic warning coloration, signaling foul-tasting chemical defenses derived from their diet. Mating pairs often remain conjoined back-to-back for hours or even days, ensuring reproductive success while still moving together across the leaf litter.

GregariousAposematicTrue Bug
European Firebug reference1 / 7
(c) Aka, some rights reserved (CC BY-SA) · cc-by-sa
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Key facts
Diet & preyLinden tree seeds, Mallow seeds, Dead invertebrates
Predators
  • Jumping spiders
  • Wolf spiders
  • Insectivorous birds
ThreatsPesticide application and intense habitat clearance
HabitatsParks, gardens, woodland edges, and sunny roadsides
Life span1–2 years
Classification
  1. OrderHemiptera
  2. FamilyPyrrhocoridae
  3. GenusPyrrhocoris
  4. SpeciesPyrrhocoris apterus
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
Harmless to humans and pets; safe to observe closely.
Responsible observation
  • Look near tree trunks: Check the south-facing bases of linden trees on warm, sunny spring afternoons.
  • Watch mating behavior: Observe conjoined pairs walking in tandem across paths and tree bark.
  • Gentle observation: Approach slowly without casting sudden shadows to avoid scattering the resting cluster.
Related species
Help improve the field guideSomething wrong?

Report a name, category, or profile issue for review.

Checking your Fauna account…