Comparison

Brown Recluse vs. Chilean Recluse

Chilean recluses are the most medically dangerous Loxosceles in the world and have established small populations in Los Angeles. They look nearly identical to brown recluses.

Summary

Chilean recluses are larger (body 8–12 mm vs. 6–12 mm), darker, and carry venom with substantially higher loxoscelism risk including systemic effects. Both have six eyes and a violin.

Diagnostic traits

Brown vs. Chilean Recluse - side-by-side
TraitBrown RecluseChilean Recluse
Body size ♀6–12 mm8–12 mm (often at upper end)
ColorTanDarker brown
Venom severityLoxoscelism, rare systemicLoxoscelism + frequent viscerocutaneous syndrome
U.S. rangeSouth-central U.S.Localized LA-area introductions

The bottom line

At-a-glance comparison

Brown RecluseChilean Recluse
ScientificLoxosceles reclusaLoxosceles laeta
FamilySicariidaeSicariidae
♀ body7–12 mm8–15 mm
Leg span20–30 mm25–45 mm
Range16 U.S. states1 U.S. states
MedicalMedically significantMedically significant