Sentence:  Black flashing storms, the lowings and bellowings of the old sanded forest, the whistling and <WSD>hooning</WSD> of nameless birds, the lonesome moons, the weird fifteen-foot stone dwellers of the Old Priory, soft grassy slopes on which lovers lay, ... 
Meaning of the word marked with <WSD> tags:  To make a hooting or howling sound.