What is "ugallu"

thumb|A panel with two divine palace guards, one of which is Ugallu. Ugallu, the “Big Weather-Beast,” inscribed U/UD.GAL-˹la˺, Akkadian: ūmu rabû, meaning “big day,” was a lion-headed storm-demon and has the feet of a bird who featured on protective amulets and apotropaic yellow clay or tamarisk figurines of the first millennium BC but had its origins in the early second millennium. The iconography changed over time, with the human feet morphing into an eagle’s talons and dressing him in a short skirt. He was one of the class of ud-demons (day-demons), personifying moments of divine intervention in human life.