For decades, the eerie call of the 'Devil Bird' has been debated. There have been various articles about the 'Devil Bird' and which bird (or animal) produces this strange, nocturnal call. Some believe that there's more than one bird that produces this call... so, who or what is the 'Devil Bird'? P.S. - There's a detailed book by R.S. Spittel where he analyses the source of the 'Devil Bird' called "The Devil Birds of Ceylon." The book is published by Sooriya Publishers (Picture in the comments se