The origin of birds
Song is thin, high and insect like. Rictal bristle function in Willow Flycatcher. Songs and calls of related birds Fringillidae. But since owls shared a fellowship with demons and witches, it was believed that they also had the power to ward off other bad spirits. Journal of Avian Medicine and Surgery
About hydroponic vegetable production
Oz, a TV personality made famous by Oprah Winfrey. The fruit is known in India as gambooge. It is apparently also an ingredient in some weight loss products as hydroxycitric acid.