In spite of that, Costa Rica is a reference model on how to face the problem of poisoning by snake bites. The venom of some species, including the Okinawa habu (T. flavoviridis), an aggressive snake that often enters human dwellings in the Ryukyu Islands, is mildly dangerous. Fortunately for visitors, most of the reptiles found in Costa Rica are perfectly harmless. Learn about them, these snakes are protected due to their being endanger of extinction: Yucaatan Neotropical Rattlesnake its Maya name is"Tzabcan", Yucatan Cantil its Maya name is "Uol poch", Yucatan Hognose Pitviper its Maya name is Chac can. You shouldn’t be scared but it is important to remember that you should respect the fer de lance. At the forefront of the fight is the Clodomiro Picado Research Institute (ICP). The name "fer-de-lance" means "spearhead" in French. In each category a maximum of 5 points is awarded and so, the higher the number the bigger or worse that factor is relative to the other snakes on the list. Keep reading to learn more about this wonderful animal. 9. Length of fangs. However, the dangerous ones more than make up for it. Fer-de-lance snake. On average, these snakes inject 105 mg of venom in one bite while the fatal dose for a human is 50 mg. To prevent water loss where they occur in drier regions, these snakes possess more scales than usual. Those are called Bothreichis. The fer de lance (Bothrops Asper) is nocturnal and generally lives in humid forests. Costa Rica Wildlife – 9 Facts About Fer de Lance. In the first half of the 20th century as well as in the 1950s and 1960s, 12% of treated cases ended fatally. According to data from the Universidad de Costa Rica, an average of 600 people is bitten by snakes throughout the country every year. Although they are not called Fer de Lance snakes or lanceheads, a number of South American species are closely related to the Fer de Lance. This venomous snake thrives and isn’t shy in areas inhabited by people where large rat populations exist. Average size of an adult snake of this species. It is known to be very aggressive, and it is a large and strong-bodied snake.. The fer-de-lance is considered one of the most dangerous snakes in Costa Rica. Its name is derived from a French expression, meaning "iron of the lance" ; … Average venom yield in a bite. On the other hand, the venom of the terciopelo (B. asper), the fer-de-lance of Central America is necrotizing, painful, and often deadly. Toxicity of venom. Fer-de-Lance. 1. Typical defensive disposition. After the fer-de-lance (Bothrops asper), it is the most common cause of snake envenoming. As dozens of blood transfusions kept him alive, doctors finally found the closest anti-venom at a zoo in Seattle. 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