When researching the extent of contact Earth scientists have had with extraterrestrials, it's all but impossible to distinguish the claims that seem in every way genuine and those who appear to have been fabricated for the purpose of receiving money and/or fame. One claim that seems difficult to accept is the "57 alien species claim" made by several internet forums. But these claims stem from a source that give some hardened skeptics reason to take a second look.
The Disclosure project along with others working in conjunction with it have several documented alien species and subtypes, including over 22 subtypes on the alien visitors known as the "greys" which many abductees claim to have encountered during their ordeals. Included in the list of species currently conducting operations on Earth (according to several sources) are the Agharians (or Aghartians), the Atlans, Cetians, Gizan (also known as Pleaideans), Janosians, Martians, Serpents, Solarians, Sirians, and Synthetics. And the list goes on. And not all of them, according to several sources are from this universe. There are still several who are allegedly connected to an alternate universe known by the Pleaideans as the "DAL" universe.
The whole scenario reads like high fantasy or science fiction, but the conglomeration of various UFO theories merges into this one central idea. And truly, how much more difficult to believe is a complex system of alien species collecting and thriving in and around our planet than merely one species with designs to come to Earth with plans for invasion?
And each species alone has a rich history documented from several sources. The level of verification for each species varies greatly of course, so some of the histories of alien species may seem incredibly fantastic while others may seem perfectly logical.
For example, the Algherians are allegedly a race of Nordic humans who discovered a cavern system beneath the Gobi desert shortly before recorded history began. The Algherians allegedly even have an alliance with the "Nagas" of Hindu mythology. The Nagas are allegedly the group that made contact with the Nazi Thule society. Ancient Tibetan legends tell of a prince who would lead an army of highly trained warrior monks into the caverns to do battle with the Naga and largely held back only to return centuries later in recent history. This story is largely based in religious texts handed down from monks in Tibet and the surrounding area.
By contrast, reading of the "Dragonworms" living beneath the earth and commanding a massive draconian conspiracy against the human race, leads one to question if this could possibly be anything more than a sci-fi fantasy. The "Dragonworms," it is said, lost their limbs over the course of several thousand years as a result of rarely or never moving and ultimately devolving. Aside from the occasional malformation such as this, the majority of species seem to bear anthropomorphic features.
How much credence should we put in a catalog of all alien races reported by various sources? Of course the veracity of this Alien compendium requires that the witnesses observing them to have done so accurately and honestly. Though most of the species depend on several independent witnesses, a few seem to have stemmed from few eyewitness accounts or second hand information told to contactees by a benevolent alien informer.