Notes from Gary Urton's "Animals & Astronomy in the Quechua Universe"
The astronomical observations of the Inca included what are known as yanu phuyu or "dark cloud" constellations. These are fixed clouds of interstellar dust located in the brightest streak of the center of the milky way. To the Inca, these interstellar dust clouds represented earthly animals:
uñallamacha, the baby llama (or llama's umbilicus, or serpent)
"Mirrors" used for Astronomical Observation, Machu Picchu
In Inca mythology and astronomy the water cycle is very important. "The Spring and the Lakes are the owners of the animals." Just as animals first were born out of a subterranean spring, just as they drink from the rivers of the earth, they also exist as dark cloud constellations in the Mayu, or celestial river in the sky, the Milky Way.
The Urubamba River in Peru is like a reflection of the Milky way on earth. In fact, the Milky Way was thought to run with earthly water from the Urubamba. As the earthly river reaches the ends of the earth, it flows into the sky and enters the "celestial river". As the Milky Way moves through the sky over the course of the rainy and dry seasons, it deposits the water back to the earth in the form of rain.
Because the movement of the constellations across the skies relate to the changing of the seasons, they also relate to the birthing cycles of earthly animals. Therefore the appearance of an animal constellation at it's zenith might indicate the height of it's terrestrial counterparts birthing season, leading to the Inca belief that the celestial animals are responsible for the health and proliferation of earthly animals.
Mach'acuay, the Serpent Constellation & Amaru, the rainbow
The inhabitants of the Inca empire who lived in the jungles surrounding Cuzco brought giant snakes (probably boa constrictors or anacondas) known as Amaru to the Inca capital as tribute.
The name Amaru also refers to rainbows, which are thought to be giant serpents. "The body of the Rainbow Serpent rises up out of one spring, arches through the sky, and buries it's opposite end in another spring." The serpent appears in the day in the form of a rainbow, and at night in the form of a dark cloud constellation.
The dark cloud Serpent constellation stands at it's zenith at the beginning of the rainy season. At this time the "large aquatic boas" (anacondas) of the earth have just given birth. "In effect, the celestial Serpent, like the rainbow serpents, emerges from the earth with the warm/rainy season, and reenters the earth at the beginning of the dry/cold season."
Hanp'atu, the Toad Constellation
"The earth is alive during the month of August, being intensely animated by the toad or pachukuti which emerges from the interior of the earth in great numbers."
The mating season of the toad in this region takes place in the following months of September and October. During this time the Toad constellation will rise just before the sun, progressively earlier and earlier, just as the terrestrial toads have just risen from the ground.
The Inca believed that if the noise from the mating toads in September and October was overwhelming, the year's crop would be abundant.
Yutu, the Tinamou Bird Constellation
The Tinamou bird is known to swallow small animals from time to time, along with its diet of seeds and fruit, and therefore the Tinamou constellation pursues the Toad across the sky. As one Quechua informant describes, in the nightly race between the Toad and the Tinamou, the Toad always wins. "Therefore, her husband likes to characterize himself as a Toad in opposition to others, who are Tinamous."
This goes along with the characterization of tinamous as slow and obtuse.They are disinclined to flight, and when they do manage to get into the air, they often land with a crash. They also reverse male/female roles in egg incubation and the rearing of offspring, which the Inca found to be extremely an undesirable mating habit.
Despite the negative projections of the Inca, the tinamou do have a beautiful story. Their eggs may be "green, turquoise-blue, purple, wine-red, slate-grey, or a chocolate color, often with a purple or violet luster." The tinamou eggs look like segments of a rainbow, and according to myth, they are.
"Tinamous are believed to have been the sole survivors of a world fire, and were responsible for preserving, through their eggs, all the colors of the rainbow."
Rain, and therefore, rainbows, occur in the Southern Andes primarily from September through April. This is consequently the time that the Inca were able to see the celestial Tinamou in the sky. Also, the entire span of the celestial Tinamou, from September through late April, also characterizes the season in which terrestrial tinamous represented the greatest threat to crops.
In Quechua astronomy, the α and β Centaurii stars of Western astronomy are called llamacñawin, or "the eyes of the llama" and they are the first part of the body of the llama to rise over the horizon.
These two stars emerging over the horizon was a common sight for the Andean pastoralist, who would rise early in the morning in the months of Novemeber and December to assist in the birthing of their llama calves, and to ward off predators with a taste for newborn llama, like foxes.
According to myth, the celestial Llama descends to the earth at midnight to drink water from the swollen rivers at the beginning of the rainy season. It is said that if the Llama did not drink this excess water, the whole world would be drowned.
Finally, the Inca were known to tie black llamas to a post, and starve them to death as a sacrifice to induce rain. Perhaps this is related to the presence of the dark cloud Llama constellation's appearance during the rainy season.
The celestial Fox's position in relation to the Llama and Baby Llama constellations is very telling of the relationship that terrestrial foxes and llamas were recorded to have. Foxes are predators of baby llama, and the herd's only defense against the death of their calves is trampling. The whole herd will rush the fox, and hopefully injure or kill it with their hooves.
The celestial Fox appears to be in a position of approaching the baby Llama, yet it is underneath the hind legs of the mother Llama, as if she were trampling him to prevent him from eating her baby.
According to myth, foxes are born principally on December 25th, four days after the solstice, on the side of a mountain called Wañumarka, "the storehouse of the dead". As the sun travels on its elliptical path, it enters the constellation of the Fox at the time of the December solstice.