Corallus caninus, commonly called the emerald tree boa, is a non-venomous boa species found in the rainforests of South America. No subspecies are currently recognized.
Description

C. caninus
Adults grow to about 6 feet (1.8 m) in length. They have highly developed front teeth that are likely proportionately larger than those of any other non-venomous snake.
The color pattern typically consists of an emerald green ground color with a white irregular interrupted zigzag stripe or so-called 'lightning bolts' down the back and a yellow belly. The bright coloration and markings are very distinctive among South American snakes. Juveniles vary in color between various shades of light and dark orange or brick-red before ontogenetic coloration sets in and the animals turn emerald green (after 9–12 months of age). This also occurs in Morelia viridis, a python species in which hatchlings and juveniles may also be canary yellow or brick-red. As opposed to popular belief, yellow juveniles (as in the green tree python) do not occur in the emerald tree boa.

From the National Aquarium in Baltimore
Based on locality some herpetologists have considered whether they should be classified as a new subspecies. The name recently suggested for this morphological variant, but not yet widely accepted, is Corallus batesii [Henderson]. Specimens from the Amazon River basin tend to grow the largest, are much more docile than their Northern relatives and attain lengths of 7–9 feet (2.1–2.7 m), while the overall average size is closer to 6 feet (1.8 m). Those from the southern end of their range in Peru tend to be darker in color. Amazon Basin specimens generally have an uninterrupted white dorsal line, whereas the white markings in the Northern Shield specimens are quite variable. The snout scales in Amazon Basin specimens are also much smaller than in their Northern, Southern and Western counterparts found, for example, in Surinam, Venezuela, Bolivia,and French Guiana. Hybrid forms between the Northern Shield Corallus caninusand the Amazon Basin form are also known to exist.
C. caninus appears very similar to the green tree python, Morelia viridis, from southeast Asia and Australia. Only very distantly related, this is an example of convergent evolution. Physical differences include the head scalation and the location of the heat pits around the mouth.

Found in South America in the Amazon Basin region of Colombia, Ecuador, Peru, northern Bolivia, Brazil, and from Venezuelato Suriname and the Guianas within the so-called Guiana Shield. The type localitygiven is "Americae. The 'Basin' variant', as the name suggests, is only found along the basin of the Amazon River, in southern Suriname, southern Guiana, southern Venezuela to Colombia, Peru and Brazil and in the surrounding jungles of the Amazon River.

The Brazilian White Knee Tarantula (Acanthoscurria geniculata)

The Brazilian White Knee Tarantula is a species of tarantula native to the Amazon basin of Northern Brazil. It is commonly referred to as the Brazilian giant whiteknee tarantula in reference its brilliant black and white banded legs. This is a large species, fast growing and taking up to 3–4 years to reach a mature leg-span of 8.5 (21.59 cm)
inches for females.
These tarantulas have been much prized as pets, due to their size, hardiness, and striking colouration. They are moderately defensive, and their urticating hairs can be quite irritating to human skin. These spiders, like many un-domesticated pets, can bite when provoked. Fortunately because they have urticating hairs, biting is typically not their first line of defence. Their venom is not considered medically significant, but due to their large size the puncture wounds can be damaging.

Eastern green mamba (Dendroaspis angusticeps)

The eastern green mamba is a large and highly venomous snake species of the mamba genus Dendroaspis. This species of mamba was first described by a Scottish surgeon and zoologist in 1849. This snake mostly inhabits the coastal regions of southern East Africa.



It is a relatively large species of venomous snake, with adult females averaging approximately 2.0 metres (6.6 ft) in total length, while males are slightly smaller on average. It is an arboreal species that preys on adult birds, eggs, bats, and terrestrial rodents such as mice, rats, and gerbils. Eastern green mambas are somewhat unusual among mambas, and elapids in general. They are shy and elusive snakes which are rarely seen. The scarcity of observations is usually attributed to this species' cryptic colouration and arboreal lifestyle; however, low activity levels associated with a sedentary foraging pattern might be an alternative explanation for its inconspicuousness.A 27-day observation of two adult eastern green mambas from the coastal forest of Gede/Jimba, Kenya conducted by Michael Angilletta showed that the eastern green mamba is not a typical active foraging elapid, but rather it is a "sit-and-wait" or ambush type predator (like most Viperidae). Like other species of mamba, the eastern green mamba is a highly venomous species, capable of killing several humans with the venom in a single bite




They are shy and elusive snakes which are rarely seen. The scarcity of observations is usually attributed to this species' cryptic colouration and arboreal lifestyle; however, low activity levels associated with a sedentary foraging pattern might be an alternative explanation for its inconspicuousness.A 27-day observation of two adult eastern green mambas from the coastal forest of Gede/Jimba, Kenya conducted by Michael Angilletta showed that the eastern green mamba is not a typical active foraging elapid, but rather it is a "sit-and-wait" or ambush type predator (like most Viperidae). Like other species of mamba, the eastern green mamba is a highly venomous species, capable of killing several humans with the venom in a single bite. Its venom is made up of pre-synaptic and post-synaptic neurotoxins(dendrotoxins), cardiotoxins, calcicludine, and fasciculins. The venom itself is of low molecular weight and is extremely rapid-acting, spreading through tissue very quickly and effectively. The dendrotoxins common to all species within the genus Dendroaspis is the most rapid-acting snake venom toxin known, so although this species is not aggressive and is not a major cause of snakebite incidents in Africa, the mortality rate associated with those bitten is rather high. A bite rapidly progresses to severe, life-threatening symptoms that are hallmarks of mamba bites. These symptoms include swelling of the bite site, dizziness, and nausea, accompanied by difficulty breathing and swallowing, irregular heartbeat, convulsions, and rapid progression to respiratory paralysis. Bites that produce severe envenomation can be rapidly fatal. Case reports of rapidly fatal outcomes, in as little as 30 minutes, have been recorded for this species.

From: https://en.wikipedia.org/wiki/Eastern_green_mamba