Radscorpion Radscorpions are large , mutated scorpions commonly found in and around abandoned structures . They originated from the North American Emperor scorpion , which were prolific in many pet stores at the time of the Great War . They have since mutated to become much larger , much faster and more venomous than ever before . Despite this , various antidote s have been derived from their mutated , stronger venom . Common radscorpions share a similar appearance , with one variant type . However , many sub - populations of unique radscorpions exist . Variations . Radscorpion . < section begin = " Radscorpion " / > These are the most common variety of radscorpion . The color of their skin may be dark brown or grayish - blue . These venomous predators seem to possess different speeds , some taking their time and others bolting at top speed . Their size ranges from that of a large dog to that of small livestock . Variants in Chicago have been seen with their stingers sometimes having a green , glowing radioactive tip . They use their stingers most of the time , and rarely use their claws . < section end = " Radscorpion " / > Professor ' s radscorpion . This is a unique , genetically engineered intelligent radscorpion . It has been so extensively modified it now possesses the ability to speak , and can play chess . You can challenge it in Perception , Agility and Intelligence . Giant radscorpion . A much larger radscorpion with a more potent venom . These terrifying creatures can reach incredible sizes from livestock to a Corvega . The giant radscorpion is often encountered in pairs , it ' s not uncommon to see one turn from the player and back off , only to be joined by another and charge in again . Albino radscorpion . The albino radscorpion is a variation of radscorpion encountered with the " Broken Steel " add - on to " Fallout 3 " . They are about the same size as giant radscorpions but lack carapace pigment . They are one of the deadliest creatures in the Capital Wasteland , and can sometimes be found fighting deathclaw s or sentry bots . In " Fallout 4 " , their main territory is the Commonwealth where they are rare to find ( occurrence increases slightly with higher difficulty - ( Very hard or Survival mode ) . They have similar strength and abilities to those seen in the Capital Wasteland and are only surpassed by the emperor radscorpion . Small radscorpion . These creatures are likely juveniles or just much smaller examples of radscorpion , as they are encountered both in company with larger varieties as well as by themselves . The strength of their attacks and the potency of their venom are proportional to their size . Their size ranges from that of a brimmed hat to a medium - sized dog . Radscorpion queen . A very rare and special kind of radscorpion , the queen is the largest variant of radscorpion in the Mojave and also the strongest . Only two are known to exist - one found in the scorpion burrow and one at Searchlight fire station . Bark scorpion . Bark scorpions are a strain of radscorpion native to the Mojave Wasteland , which , as their name implies , evolved from North American s mutation . They are easily identified from other species of radscorpion by their mottled , brownish carapace and the fact that they are much smaller than the larger . Despite being a species of radscorpion , they do not get along with their larger and more violent cousins , and are frequently preyed upon by them . Bark scorpions differ from radscorpions not only in size and coloration , but in attack methodology . Whereas radscorpions tend to engage a target the second they see it , bark scorpions tend to hang back and try to outflank the player if at all possible . This is made worse by their tendency to jump short distances if they detect prey that ' s gotten too close in a hurry . If encountered in numbers , they frequently try to surround their intended target . While significantly weaker physically than their heavier - bodied cousins , the bark scorpion has dramatically more dangerous venom , causing more damage over time , as well as blurred vision . Bark scorpion hunter . Among bark scorpions , these are the larger and more aggressive individuals . They are generally found in the same areas as their smaller counterparts , and can be difficult to distinguish from regular bark scorpions . Glowing radscorpion . < section begin = " Glowing radscorpion " / > These types of radscorpions live in highly radioactive areas in Texas . Two known locations of this variant are found is the Carbon crater near the town of Carbon and the Secret Vault ruins ( both areas have suffered a nuclear bomb and had many radioactive elements before ) . Similar to normal radscorpions , glowing radscorpions have been irradiated far past mutation to the point where they visibly glow even in bright sunlight ( similar in the process to glowing one ) and get a green aura and a light whitish - brown color . They are a bit more aggressive than the normal variety . Both their pincer claw attacks and stinger strikes subject the victim to high radiation exposure . Once dead , they release a highly radioactive green smoke for three seconds . These variants can be found once again in the Commonwealth with a medium - rare occurrence of respawning to the player ' s location . They have similar abilities and strength to those found at " Carbon Crater " with the exception that they can no longer release radiation when killed or release it through their stingers . They can only emit low - level radiation when engaging in close battle and appear frequently if the difficulty is set high ( Very hard and above ) . < section end = " Glowing radscorpion " / > Spitting radscorpion . < section begin = " Spitting radscorpion " / > Spitting radscorpions are native to the Carbon crater near the town of Carbon , as well as the Secret Vault ruins . Much like the glowing radscorpions , they are the result of prolonged exposure to radiation . They have developed the ability to spit radioactive venom at great range . Their claws are severely underdeveloped and used generally for protecting the spitting radscorpion ' s head but they can still be used as a weapon if necessary . Spitting radscorpions are yellowish green in color with a bright red coloring on their back and legs . < section end = " Spitting radscorpion " / > Large giant radscorpion . < section begin = " Large giant radscorpion " / > Even larger giant radscorpion are rumored to live near the irradiated Carbon crater in Texas . High radiation levels and special environment in the crater has caused them to mutate to enormous size and develop traits uncommon to their kind . They are the biggest of all radscorpions , approximate to a large tractor - trailer in size . Their massive claws are used as both weapons and shields with extraordinary range and can block bullets . It has a big , reddish eye sits in the center of their head and possesses an extremely robust exoskeleton . Strong and fast , they have only one known weak spot : the arms supporting their giant claws . If these limbs can be damaged or destroyed , they are left to rely on their deadly stinger alone . < section end = " Large giant radscorpion " / >