prey. Generally nocturnal, it may forage at any time of the day, though, if necessary. These snakes are also easily agitated. Feeding The main diet includes mostly small mammals (such as rodents and opossums) and birds, but also frogs, lizards, smaller snakes, fish, centipedes, and tarantulas. Larger prey is struck and released, after which it is tracked down via its scent trail. Reproduction Bothrops atrox can give live birth to up to 80 offspring at once. Adults breed year-round. After mating, females with developing embryos travel in and out of sunlight to keep themselves and the embryos at a constant temperature. In equatorial regions, the gestation period is about three to four months, with an average of 60 young per litter. At birth, the young are about in total length, more brightly colored than adults, and have yellow or beige tails. Venom These snakes are known to search for rodents in coffee and banana plantations. Workers there are often bitten by the snakes, which can lie camouflaged for hours, nearly undetectable, and strike with high speed. Their venom is hemorrhagic, damaging the vascular endothelium and consuming coagulation factors in a mechanism known as “venom-induced consumption coagulopathy”. As a result, clotting assays such as prothrombin time and aPTT will be highly disturbed. Spontaneous recovery from coagulopathy is seen 14 to 30 hours after bite according to a study performed in French Guiana. A Mexican polyvalent antivenom was tested but had no effect on it. Bothrops atrox venom can result in several systemic and local symptoms, such as severe bleeding, kidney failure, abnormal clotting, blisters and necrosis. The bite can also result in hemorrhage in the central nervous system, which leads to sequelae and even death. In a case reported in the Brazilian Amazon, symptoms such as pain and ecchymoses, headaches, nausea, vomiting, diarrhea, hypertension and blood incoagulability were reported, the patient died of stroke, even after administration of the antivenom. The Common lancehead has an LD50 of 1.1 to 4.9 mg/kg, the venom of juveniles is more inflammatory, lethal, hemorrhagic and kills more quickly than that of adults, people bitten by neonates are more likely to develop coagulopathy. Venom yield averages , although it may be as much as . The enzyme reptilase (batroxobin), derived from this snake's venom, is used in modern medical laboratories to measure fibrinogen levels and blood coagulation capability. The test is considered to be a replacement