Common Lancehead

Most common cause of snakebite in the Amazon region. Highly adaptable and prolific.

FamilyViperidae

GenusBothrops

RegionSouth AmericaSouth America

Photo: Bernard DUPONT from FRANCE · Source: Wikimedia Commons · License: CC BY-SA 2.0

Common Lancehead

Photo: Bernard DUPONT from FRANCE · Source: Wikimedia Commons · License: CC BY-SA 2.0

Common Lancehead

Danger Score

Final Danger Score

Venom Core

Lethality weighted 55% (potency × yield). Clinical weighted 45% (real-world CFR).

0.55 × 47 + 0.45 × 6956.9

Modifiers

Multiplicative scalers - amplify or reduce existing danger, can't create it from nothing.

× Speed (1.01)57.5

× Delivery (1.00)57.5

× Encounter (0.96)55.2

Speed = antivenom window. Delivery = fang efficiency. Encounter = exposure × temperament.

Score55

Venom Profile

Type

HemotoxicTargets blood and circulatory system; disrupts clotting and can cause bleeding disorders.,CytotoxicDestroys cells and damages tissue; can cause permanent tissue damage and disfigurement.

Venom Yield

High

Venom Speed

Quick

Potency (SC Equivalent)

3.300mg/kg LD50

Max Dry Yield

100mg dry

Clinical Severity

Fatality (Untreated)

10-20%

WHO Importance

Cat. 1

Local Effects

Pain at bite site, Swelling, Necrosis

Blood

Internal bleeding, Coagulopathy

Muscle

Kidney failure

Causes of Death

Massive internal bleeding, Kidney failure