Gecko ( Fallout : New Vegas ) Geckos are in the Mojave Wasteland . Characteristics . Biology . Geckos can be found living across the entire Mojave Wasteland , with many different species calling the local area their breeding grounds . They are said to have been stemmed from Fire Root Cavern . There are three types of gecko in the Mojave : normal geckos , golden geckos , and fire geckos . Another variety , the green gecko , is found in Zion Canyon in the " " " Honest Hearts " . Geckos in general are reptilian and are normally born with a pair of fins behind their heads . Their eyes possess an orange tint , and their body coloration differs greatly based on the gecko sub - species in question . Geckos have evolved with five fingers and five toes . Dependent on type , they range from the size of a small human child , to heights exceeding that of average human adults . Gameplay attributes . Geckos are generally found in small packs . Once a single gecko attacks something or is attacked , its pack will join the fight . They charge or leap at their opponents with their mouths open , ready to snap down , along with being known to simply attack rapidly with their claws . Some sub - species of geckos can breathe fire or spit a poisonous liquid , so that they may also attack from a distance . Their hides and meat prove useful as survival crafting ingredients ; in particular the hides , once tanned , can be used to craft several varied types of that offer greater defense than their base variants along with resistances to fire , poison , and radiation . Geckos , green geckos , and golden geckos are affected by the Animal Friend perk . Fire geckos , however , remain hostile to the Courier with the perk . This is because fire geckos are classified as abominations , while other geckos are classified as animals . This means that fire geckos will flee if shot with a flare gun , just like any other abomination will do ( which is remarkable considering their accustomedness to fire ) . Variants . Gecko . Geckos appear in small to large packs depending the location . They will charge at their prey with their mouths open , and attack by biting and with swipes from their claws . Geckos can be found mostly in the areas surrounding Goodsprings , along the I - 15 towards Primm and the Mojave Outpost . These are the least dangerous species of gecko found within the Mojave . Gecko hunter . Gecko hunters look identical to normal geckos , but have greater health and speed . They are very fast and will attempt to rush and overwhelm their prey by attacking in groups . Young gecko . Standard geckos that have yet to mature fully . They are smaller and less damaging than adult specimens , but share similar behavior and may appear with them in packs . Young gecko hunter . These immature geckos are smaller and weaker than adult gecko hunters , but attack in the same way . Although appearing as hostiles on the compass , they often ignore nearby life unless provoked . Golden gecko . A type of gecko with brilliant golden scales . They can be found around irradiated areas such as Crescent Canyon east and Crescent Canyon west , Vault 34 , Cottonwood crater and the Searchlight church basement . Golden geckos have been affected by high levels of radiation , leading to their larger size and unique coloration . In addition , exposure to radiation has caused their attacks to inflict significant amounts of radiation damage . Golden gecko hunter . These geckos may appear alongside golden geckos and attack in the same way . Their bites are similarly irradiated , dealing less radiation / second but for a longer period of time . Golden gecko hunter melee attacks do similar damage to regular golden gecko melee attacks . Young golden gecko . Golden geckos that have yet to mature . They are seldom found alone and are usually found with adult geckos . Although weaker than matured variants , their speed makes them a threat to inexperienced players . Fire gecko . Fire geckos have mottled purple and red hides , and prominent spikes on their backs . In addition to their bite and claw attacks , they have the ability to breathe fire . They can mainly be found in and around mountainous areas and caves , such as the Lucky Jim Mine and Nopah Cave . Young fire gecko . These immature geckos are smaller and weaker than adults , but attack in the same way and share the ability to breathe fire . They may be encountered in groups with full - grown fire geckos . Legendary fire gecko . The legendary fire gecko is one of the five . It is roughly twice the size of a normal fire gecko and its powerful and fast attacks makes it a dangerous opponent in close combat . It is found in Fire Root cavern . Green gecko ( " Honest Hearts " ) . Green geckos are native to and only found in Zion Canyon . When attacking from a distance , they can spit several far - reaching but slow - moving globs of poisonous saliva , somewhat resembling the radioactive spit attack that use . Once in contact with an enemy , they will attack like other types of gecko , by biting and clawing . Green geckos are almost always found in packs ranging from two to eight . Green geckos are often found near waterways and bridges in Zion Canyon . Young green gecko ( " Honest Hearts " ) . Young green geckos are smaller and weaker than adults , but spit poisonous saliva and attack in the same way . They are only found in Zion Canyon . Giant green gecko ( " Honest Hearts " ) . Another type of giant creature native to Zion Canyon , these geckos are larger than a human and have almost the same destructive power as the legendary fire gecko . Appearances . Geckos appear in " " .