I’ve always thought that slavery was a man made concept, but recently found out it also exists in the animal world; which made me wonder what other things there are that we frown upon or are amazed by, only to find out the good lord’s critters are also doing it. Everyone knows about the obvious ones like communication and working with tools, but does anyone here have other examples of things usually thought to be man made which turn out to be not. Praying Mantis does not count. 
plenty animals partake on homosexuality. that’s my only input in this regard. and if the bible says its sin, then the those penguins are going to hell. poor bastards.
I once saw a sign on a gate that read “BEWARE OF THE DOG - HE IS VERY SARCASTIC”
Mintaka
eta: I got two - Sonar and electricity!