Mexico's Vampire Witch

 From Atlas Obscura: "Mexico’s Vampire Witch Has a Twisted Origin Story: The terrifying teyollohcuani is a shape-shifter of ancient indigenous lore, dark colonial history, and pop culture." From the article:

Beware the teyollohcuani, a vampiric witch. It may take the form of a harmless elderly woman or man, but then shape-shift into an animal—usually a turkey, vulture, or other large bird. It flies into homes to suck the blood of infants, or worse: The word teyollohcuani actually translates as “customarily eats human hearts” in the Mexican Nahuatl language. The creature first took shape in precolonial Mexico and has been evolving ever since, as Spanish, African, and modern pop culture monsters intermix.

Also:

    [Researcher] Martín del Campo believes the teyollohcuani originated within societies that spoke Oto-Manguean languages—a large linguistic family in the region—then spread to the Nahua, the ethnic group that includes the Aztecs. Tales of the teyollohcuani are now found throughout Central Mexico, from the state of Oaxaca on the Pacific coast to the Huasteca region along the Gulf of Mexico. The creature goes by different regional names, and sometimes has region-specific traits: While it usually appears as an old woman, or sometimes an old man, some incarnations can travel by flying fireball, or turn their arms into wings made of woven mats.

    While the teyollohcuani today is seen as malevolent, that might not have always been the case, says Martín del Campo. In precolonial times, “shape-shifting was something only those who were attuned with the higher levels of the sacred, such as gods and priests, could do,” he says. “When the Spanish arrived, their ideas of shape-shifting were associated with witchcraft, and witchcraft was inherently evil. These beings that had formerly been sacred and mythical now turned into monsters.”

    The term teyollohcuani was first documented in 1555 in Alonso de Molina’s Nahuatl and Spanish dictionary. However, earlier works, such as the Codex Borgia, a visual record of precolonial Mexico created between 1450 and 1500, feature many images of colorful birds and raptors consuming hearts and possibly blood.