At all events this kind, the Philodryas aestivus-a beautiful and harmless Colubrine snake, two and a half to three feet long, marked all over with inky black on a vivid green ground-not only emitted a sound when lying undisturbed in his den, but several individuals would hold a conversation together which seemed endless, for I generally fell asleep before it finished.
"Far Away and Long Ago"
W. H. Hudson