Mexican Legend Lechuza
The White Owl Witch also called La Lechuza is an urban legend told in many parts of northern Mexico and into Texas. The tales are numerous and most likely used to keep people from getting drunk and wandering at night, or to keep children from venturing out at night.
What Does a White Owl Witch Look Like?
La Lechuza is described as a human size (up to 7′ tall with a wingspan of 15′) white owl that sometimes has the face of an old woman. The face has large, dark, almond-shaped eyes. In some tellings of the legend, it is a human-sized blackbird. The consistent characteristics are that it is a bird that is huge. (mexicounexplained.com)