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Bothrops atrox

Bothrops atrox
Photo Information
Copyright: Jesus Linares (jlinaresp) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1303 W: 56 N: 4023] (17292)
Genre: Animals
Medium: Color
Date Taken: 2010-10-30
Categories: Reptiles
Camera: Canon SX 110 IS
Exposure: f/4.3, 1/160 seconds
Details: (Fill) Flash: Yes
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2010-10-30 18:49
Viewed: 4398
Points: 19
[Note Guidelines] Photographer's Note
Bothrops atrox - Linnaeus, 1758 - "Mapanare"

At this moment I am absolutely exhausted! ... Just a couple of hours ago I returned from a long walk, I walked over 7 hours to get to a place called "black hole", I last visited 20 years ago. The last two hours of way, I was guided by two friends explorers, who know well the way to that place (I had forgotten the path, which is almost erased, in fact, during final two kilometers, there is no way!)

The note more "interesting" in this long walk was that I was near of "put my hand on this snake" when we climbed the dark and wet edge of cause of a river!

You should have seen the scene! ... ha ... ha ... ha :) ... I let out a scream broking the silence of this forest! haaaa... haaaaa... haaaa... :) Like a scared girl! haaaa... haaa... haaa... Then I pull out my camera and almost died of fright, I made a couple of pictures before the snake fled!... after, I had a crisis of nervous laughter! The faces of my friends was a poem! ha....haaa... :)

The "Mapanare" (common name) is our most feared and deadly (by number of recorder bites) snake, I think this was a juvenile about 80 cm long, but has enough toxin to necrotizing a leg or an arm quickly, or maybe kill an adult human.

This is the first time I'm so close to being bitten by a snake. I usually walk on the paths frequented by explorers and farmers. But this incident tells me: "walk through pathless places is much more dangerous!"

PS: This time you do have to accept that is a pretty bad picture! :)

Thanks by stop and visit!


Reino: Animalia
Filo: Chordata
Clase: Sauropsida
Orden: Squamata
Familia: Viperidae
Género: Bothrops
Especie: atrox - Linnaeus, 1758

Description: Bothrops atrox is a venomous pitviper species found in the tropical lowlands of northern South America east of the Andes. No subspecies are currently recognized. This species is very dangerous and is the cause of more human fatalities than any other American reptile.

A terrestrial species, adults usually grow to total length 75–125 cm and are moderately heavy-bodied. Reports of the maximum size are not clear, as this species is often confused with B. asper. Soini (1974) mentioned that of a series of 80 specimens collected in northeastern Peru, the largest was a female of 138.8 cm. The largest specimen measured by Campbell and Lamar (2004) was a female with a total length of 162 cm.

Common names: The Spanish common name barba amarilla (yellow beard), an allusion to the pale yellow chin color, is also used in English. In Guyana it is called labaria or labarria. In Peru it is called aroani (Yagua), cascabel (juveniles), ihdóni (Bora), jergón, jergona, jergón de la selva, macánchi (Alto Marañón), machacú, marashar and nashipkit (Aguaruna names). In Venezuela it is called "mapanare". In Colombia it is known as mapaná (Llanos of Vichada) and taya equis, in Peru as jergón. The latter is an allusion to the x-like markings of the color pattern. In Ecuador these x-like markings have led to the snake simply being referred to as equis (the Spanish pronunciation of the letter 'x'). In Trinidad it is known as mapepire balsai.

Range:Found in the tropical lowlands of South America east of the Andes, including southeastern Colombia, southern and eastern Venezuela, Guyana, Suriname, French Guiana, eastern Ecuador, eastern Peru, Panama, northern Bolivia and the northern half of Brazil. The type locality is listed as "Asia", which is obviously a mistake. Schmidt and Walker (1943:295) proposed that this be corrected to "Surinam.

Habitat: Despite the vast destruction of rain forests, it is amongst the most numerous of pit vipers and is not endangered. In Trinidad it prefers wet lowland forests.

Adult behavior: Although generally terrestrial, it is also an excellent swimmer and even climbs trees when necessary to reach prey. Generally nocturnal, but may forage at any time of the day if necessary. These snakes are also very easily agitated and strike quite often.

Feeding: The main diet includes most small mammals and birds, but also frogs and lizards. Larger prey is struck and released, after which it is tracked down via its scent trail.

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 striking with high speed.

They are much feared because their venom is a hemotoxin that is particularly lethal and fast-acting. The fatality rate used to be high, but nowadays treatment is usually possible if the victim receives medical attention soon enough. Venom yield averages 124 mg, although it may be as much as 342 mg. The fatal dose in humans is just 62 mg.

Commonly, bites from this snake to humans cause symptoms including nausea, blackouts, and paralysis. In almost all cases, temporary or sometimes permanent loss of local or 'short term' memory were reported. Extended hospital stays, as well as weight loss of up to fifteen pounds have been reported.

The enzyme, reptilase (batroxobin), derived from this snake's venom is used in modern medical laboratories to measure fibrinogen levels and to measure blood coagulation capability. The test is considered to be a replacement for Thrombin Time, and is used when heparin is present in the sample. The enzyme is unaffected by heparin.

Reproduction: Breeds year-round. After mating, females with developing embryos travel in and out of sunlight to keep them at a constant temperature. In equatorial regions, the gestation period is approximately 3–4 months, with an average of 60 young per litter. At birth the young are about 30 cm in length, more brightly colored than adults, and have yellow or beige tails.

Model: SP565UZ
Software: Adobe Photoshop CS3 Windows
Exposure Time: 10/1600 sec
F-Stop: f/4.3
ISO Speed Ratings: 64
Focal Length: 2871/100 mm
Date Taken: 2010-10-30 12:00
Metering Mode: Spot
Flash: Flash fired
File Size: 284 kb

manaswi27, tuslaw, Ilducabianco, marius-secan, paolo49 has marked this note useful
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Critiques [Translate]

ha ... ha ... ha :) ...
ok this time you are right

  • Great 
  • tuslaw Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2754 W: 282 N: 4931] (19883)
  • [2010-10-30 20:06]

Hello Jesus,
For a quick shot this isn't bad at all, as a matter of fact I like it a lot. It shows the snake in it's natural habitat and in a wonderful pose. You managed to capture some pretty good detail and the color is natural. Sounds like you had a great time on your hike, even though you are now exhausted.

Ciao Jesus, stavolta ti do ragione, un po' troppo scuretta e al di sotto delo standard a cui ci hai abituati, poi a me non piacciono i serpenti, però è sempre una bella testimonianza di una specie che non conoscevo, simpatica la nota, buona Domenica, ciao Silviol

hello Jesus
very nice picture of this snake in the nature
greeting lou

Ciao Jesus. Ottima cattura in situazionidi luce alquanto difficili. Non è un "cobra" ma va bene lo stesso.


Hello Jesus,
Fantastic capture with nice details and great colours.
Very good composition.

Hola Jesus

Vaya que momento para hacer la foto, no estarías metido en el agua supongo. A mi no me gusta estar cerca de una serpiente, les tengo algo de pánico. Algo oscura la imagen, pero todo no se puede pedir encima que la has visto...

Un saludo de Antonio

  • Great 
  • fthsm Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 172 W: 56 N: 512] (3689)
  • [2010-11-01 4:57]

It makes more sense after reading the story :)
You made a good job even under difficult light conditions. TFS.

Hello Jesus,
another beautiful image, with sharpness and light perfect, Regards, Paolo

It looks like a DIAMOND BACK rattler. It can hurt and hurt a lot. It is most unlikely to kill an adult human.
Great adventure!!!
Loved your story NOTWITHSTANDING....
Regards from Calgary,
P.S. Have posted a tiny and ENLARGED type image once more. Hope you like it.

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