Understanding Hypnale hypnale (කුණකටුවා) – The Hump-Nosed Pit Viper of Sri Lanka – By Bhanuka – eLanka
Sri Lanka is home to a fascinating array of wildlife, including a variety of snake species, some of which are venomous. Among them is the Hypnale hypnale, also known as the hump-nosed pit viper, or “කුණකටුවා” in Sinhala. This snake is unique to Sri Lanka and parts of South India, and while small, it poses a significant threat due to its venom. This article delves into the characteristics, habitat, venom, and safety precautions related to the Hypnale hypnale, along with advice on what to do if bitten by this snake.
Identifying Hypnale hypnale (Hump-Nosed Pit Viper)
The hump-nosed pit viper is a small snake that typically reaches a length of 30–45 cm. Here are some identifying features:
- Distinctive Hump on the Nose: One of the most unique characteristics of Hypnale hypnale is the hump on its nose, giving it a distinctive appearance and its common name.
- Color and Pattern: This viper generally has a brown or grayish-brown body with dark, irregular patterns, which helps it camouflage in leaf litter on the forest floor.
- Triangular Head: Like other vipers, it has a broad, triangular head that is slightly wider than the neck, a common trait among venomous snakes.
- Pit Organs: It has heat-sensitive pits between its eyes and nostrils, allowing it to detect warm-blooded prey even in low-light conditions.
Habitat and Behavior
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Hypnale hypnale is primarily found in:
- Lowland Forests and Plantations: This species inhabits tropical forests, rubber plantations, and tea estates.
- Leaf Litter and Bushes: It often hides in leaf litter or low vegetation, blending in with its surroundings to avoid detection by predators and to ambush prey.
- Nocturnal Behavior: Though it can be seen during the day, this snake is mainly active at night, when it hunts for small animals like frogs, lizards, and rodents.
The hump-nosed pit viper is generally not aggressive and prefers to avoid human contact. However, bites occur when people accidentally step on or handle it without realizing it.
Venom and Medical Concerns
The venom of Hypnale hypnale is hemotoxic, which means it affects the blood and tissues. While initially considered relatively harmless compared to other venomous snakes, recent studies have shown that its venom can cause severe complications. Here’s what you should know:
Symptoms of Hypnale hypnale Bite
- Localized Pain and Swelling: The bite site may swell and become painful within minutes of being bitten.
- Bruising and Blistering: As the venom spreads, the area may bruise, and in some cases, blisters can form.
- Tissue Necrosis: In severe cases, the venom can lead to tissue necrosis, which requires medical intervention to prevent further complications.
- Systemic Symptoms: Some victims experience nausea, vomiting, dizziness, and even renal failure if left untreated.
Severity and Treatment
Hypnale hypnale venom is potent enough to cause fatalities, especially in young children or those with compromised health. However, fatalities are rare, and with prompt medical treatment, recovery is often possible. Here are some key points regarding treatment:
- Antivenom: There is no specific antivenom for Hypnale hypnale. Treatment primarily focuses on managing symptoms and preventing complications.
- Hospitalization: In most cases, patients need to be hospitalized to monitor symptoms and receive supportive care, such as pain management, hydration, and wound care.
- Long-Term Effects: Some bite victims may experience prolonged issues, such as kidney damage or chronic pain.
Safety Tips and First Aid for Hypnale hypnale Bites
Preventing Snake Bites
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- Wear Protective Gear: When working in fields, plantations, or forests, wear boots and gloves to protect yourself from accidental bites.
- Watch Your Step: Be mindful when walking in areas where these snakes are commonly found. Avoid stepping on piles of leaves or vegetation where snakes may hide.
- Do Not Handle Snakes: If you see a snake, keep a safe distance. Do not try to catch or handle it.
First Aid for a Hypnale hypnale Bite
If bitten by a hump-nosed pit viper, here are some first-aid steps to follow:
- Stay Calm: Try to stay as calm and still as possible to slow the spread of venom through your bloodstream.
- Immobilize the Affected Limb: Keep the bitten limb immobilized at or slightly below heart level to reduce venom spread.
- Do Not Use a Tourniquet: Avoid tying a tourniquet around the bite area, as this can restrict blood flow and worsen tissue damage.
- Seek Immediate Medical Attention: Go to the nearest hospital as quickly as possible. Inform medical staff that you’ve been bitten by a hump-nosed pit viper.
Conservation Status
The Hypnale hypnale is listed as “Least Concern” by the International Union for Conservation of Nature (IUCN), as it has a wide distribution and stable population. However, habitat loss due to deforestation and human encroachment poses a potential threat to this species. In some regions, people kill these snakes on sight due to fear, which impacts their population.
Interesting Facts About Hypnale hypnale
- Native to Sri Lanka and South India: While commonly found in Sri Lanka, it’s also present in certain areas of South India, adding to the biodiversity of both regions.
- Role in Ecosystem: As a predator of small animals, Hypnale hypnale plays a crucial role in controlling the populations of various insects and rodents.
- Misunderstood Reputation: Although feared for its venom, Hypnale hypnale is generally shy and avoids humans. Bites typically occur when the snake feels threatened or surprised.
Conclusion
The Hypnale hypnale, or hump-nosed pit viper, is a small but potentially dangerous snake species found in Sri Lanka and South India. While its venom can cause significant health issues, especially in severe cases, Hypnale hypnale generally poses little risk if left undisturbed. By understanding its behavior, habitat, and the proper first-aid measures, we can coexist safely with this unique creature and appreciate its role in maintaining the ecological balance.
Whether you’re an outdoor enthusiast, a wildlife researcher, or simply curious about Sri Lanka’s diverse wildlife, learning about Hypnale hypnale is essential to appreciating the unique biodiversity of the region.
