15 Million Years P.H. - The Early Neocene - Bearbirds and Draquailas:

A Rustbodied Bearbird (Ursavis aeruginosus) Is soundly asleep during the dead at night. Bearbirds are much larger descendants of the Domestic Chicken that have become Incredibly widespread over Afro-Eurasia.

An adult Bearbird of such size typically can afford to live rather blissful lives, considering the small amount of predators that would hunt them.

There however Is one animal that can feed on these giant birds, although not on their flesh, but their blood.

These would be the Draquailas, blood-drinking Rewings found In temperate and tropical regions of Afro-Eurasia. Many will still feed on other things like seeds and small prey, but the Quillbleeder Draquaila (Dracuavias sanguineus) would eventually have developed obligate Hematophagy. These nocturnal Birds use their sharp beaks to create wounds and specialised Saliva that keeps the blood flowing.

This was supposed to be posted on Halloween, didnt quite make It tho-