This picture is directly related to ASH, showing a human-Hybrid Vulture, born a century after the Phenomenon Called Emergence.
Before humans were ever brought to Madrona as slaves, Cybernetic lifeforms were present and hiding in the Underground. It was after the first Dark era, where humans were released from slavery and some of them made contact with the ones they later named Scaves.
In their Original form, these robotic creatures evolved in Giant Cybernetic Nests, defending them from any threat. They attacked humans that were exploring their territory. Of course this lead to a situation that was very simple with more humans sent by the Dominion. This time they were helped by ascendants to give the same fate to the Scaves as they did with the darkness. Unlike their look, those creatures were the result of thousands of years evolution, capable to assimilate other life forms. They let humans and ascendants get far into their nest. Weeks later, strange Cybernetic hybrids emerged, with human features, even in their expressions...
will not give more explanations x'P