Ufonaut (1865, Siberia, Russia)

While looking for a lost animal from his herd, a shepherd came across a forest glade containing a giant sphere with supports. Accompanying this sphere were a group of large, humanoid 'monsters', and his lost animal lay next to them. The cow was dead, and its stomach was slit open despite the lack of blood or gore visible on the scene. The humanoids bent over the animal, looking like they were studying it or possibly cutting something out of it, according to the witness. Later, they noticed the witness and gestured to him 'in a strange fashion', at which point he ran away from the area in fear.
Source: 'The Soviet UFO Files' by Paul Stonehill

Demon (February 13th 1866, Bracken County, Kentucky)

On Monday night the owner of a local plantation and his family had retired to rest when suddenly they were aroused by a great outcry from the 'Negro' quarters, which was immediately to the rear of the house. They heard men, women and children screaming in terror, creating a scene of utter pandemonium. His wife and him sprang from their bed. Their room was illuminated as brightly as by a flood of sunlight, though the light was of a bluish cast. At first they thought that the 'Negro' cabins were being consumed by fire. They rushed to the windows and beheld a sight that fairly curdled the blood in their veins with horror and filled their hearts with utmost terror. Their daughters, shrieking loudly, came flying into the room, hysterical with fear. They beheld, standing to the right of the upper cabin, near the fence that separated the 'Negro’s' garden from the house yard a creature of gigantic stature, and the most horrifying appearance. It was nearly as high as the cabin and had a monstrous head not similar in shape to that of an ape, with two short white horns above each eye, and it had long arms, covered with shaggy hair of an ashen hue that terminated in huge paws, not unlike those of a cat, and armed with huge and hooked claws. Its breast was as broad as that of a large sized ox, its legs resembled the front legs of a horse, and only the hoofs were cloven. It had a long tail armed with a dart shaped horn, which it was continually switching about. Its eyes glowed like two living coals of fire, while its nostrils and mouth were emitting sheets of blue colored flame, with a hissing sound, like the hissing of a serpent only a thousand fold louder. Its general color, save the arms, was a dull dingy brown. The air was powerfully impregnated with a smell of burning sulfur. The poor 'Negroes' were evidently laboring under extreme terror, and two of them, an old woman and a lad were actually driven to insanity by their fears and have not recovered their reason up to this writing. The strange creature then was enveloped in a spiral in a spiral column of flame that reached nearly to the top of the locust trees adjacent, and which hid its horrid form completely from view. The extinction of the flame was instantaneous, and with its disappearance they were relieved of the presence of this remarkable visitor. It was reported that the same or similar creature appeared on several nights at neighboring plantations.
Source: Anomalistic List - Jerome Clark, quoting Nathaniel G. Squires

Ufonaut (Summer 1901, Bournebrook, West Midlands, England)

Frank Warily; ten years old, was taking a shortcut along a path behind his terraced housing estate. Suddenly he came upon a strange object sitting on the grass and thought that it was a workman’s hut. There was a small box-shaped ship’s funnel on top and a door on the side. The object was a greenish blue metallic color with a sheen, half the size of a modern car. Suddenly Frank was confronted by two small beings who stepped down out of the doorway. They were four feet high, clean-shaven, and looked human with no odd features. They wore tight-fitting one piece uniforms with a greenish gray Military look and each wore a dark helmet that masked the eyes and ears almost completely. Emerging from the top were two wires almost like horns on a Viking’s helmet. The wires rose nine inches. One humanoid remained in the doorway. The other moved towards Frank with his arms outstretched, suggesting to Frank to get out of his way. Frank got out of the way and as he was doing this the humanoid scuttled back into the machine and the door closed. There was then a brilliant flash like electric arcing that lit up the perimeter of the object as well as a whooshing sound and the box-shaped craft climbed up into the sky in a curved flight. Frank noticed a pulsating red light at the rear as it ascended. This is one of the earliest reports of creatures specifically identified as ufonauts being observed close to their craft. It is interesting that they appear to have warned the witness to stay away, though this gesture may have been misinterpreted.
Source: Derek James and Phil Bennett, Nufon News #50.

Am Fear Liath Mòr (1900, Ben MacDhui, Scotland)

Two men were chipping for crystals on the slope of a mountain, when they suddenly became aware of a giant gray-colored ten-foot tall figure walking towards them. The figure was momentarily lost from sight in a dip on the slope, and then the witnesses became extremely terrified and ran away from the area. There is a rich history of sightings of phantasmal giants on this Scottish mountain, so much that a name has been given to the creature - Am Fear Liath Mòr or the Grey Man.
Source: ‘Mystery Animals of Britain and Ireland' by Graham J. McEwan

Ufonaut (1900, Kuhmo, Lentiira, Finland)

Four children had gone into the swamp and wooded area in order to collect cloudberry. The older children were supposed to keep an eye on the younger ones. An adult had also stayed close by, at the foot of a large pine tree keeping a close eye on the children. Suddenly she became aware that the children were nowhere to be seen; terrified, she ran to the village and immediately a search party was organized and a thorough search was conducted for days, however no trace of the children was found. However weeks after their strange disappearance, the children suddenly appeared again, standing under the large pine tree. After being interrogated by village elders, all the children could remember was that they were approached by some “friendly people” and invited to fly onboard a “device in the air.” According to some of the children, they were able to look down and see the Earth below them. The children were in good health and the adults could not explain how they had gone without food or shelter in the woods for several weeks.
Source:http://www.suomenufotutkijat.fi/ufodb/ufodata.php?u=161&p=1

Terror Bird (1641-1922, Argentina & Chile)

The Aónikenk people of Argentina and Chile have a legend that talks about an evil spirit of the cold by the name of 'Kelenken', which is described as a giant black bird of prey. A Chilean Jesuit priest known as Alonso de Ovalle produced a map that has been dated to 1641 - and it depicts animals such as llamas and rheas with an accurate scale, but also shows something resembling an enormous raptor standing on a steppe. This bizarre image (shown above) resembles an extinct bird of the higher classification Phorusrhacoidea. These animals were flightless predators that could reach 9.8ft tall in some cases.
Interestingly, a Professor F. B. Loomis released an article in the New York Times in 1922 discussing cryptozoological occurences in Patagonia - mostly living plesiosaurs - but also noted that several local cowboys 'sometimes talk of great wingless birds'. He attributed this to their drunken hallucinations, but how could these mainly illiterate men have known about the history of terror birds in the region if not from personal experience?
If these bizarre events are the sum of something more than coincidence, then they could serve to provide evidence that the terror birds may have still roamed Patagonia until roughly 100 years ago.

Sources: http://patagoniamonsters.blogspot.co.uk/2009/12/flying-creatures-strange-birds-part-3.html and https://www.nytimes.com/1922/03/11/archives/seeing-things-in-patagonia.html

Griffin (1540s, Peru)

In the 15th century, there were reports of a gigantic creature described as a 'condor-griffin'. Pedro Cieza de León, a Spanish conquistador and chronicler, noted that in Perú during the 1540s there were 'some very big condors that almost look like griffins some attack lambs and small guanaco in the fields'. The Andean Condor has been known to steal children and guanacos (llamas), and the local Tehuelche culture has a myth in which a demigod plucks the feathers from the condor's head as punishment for stealing children. The general Patagonia area was also home to Argentavis magnificens, the largest condor ever known to science - which would have had a 7 meter wingspan. If one of these extinct giants had survived into the 15th century then it could easily account for Cieza de León's report.
Source: La Crónica del Perú by Pedro Cieza de León