I came in in 1990 and was out of the "loop" for so long that when I started seeing all of this frog stuff, etc., all I could do was scratch my head.
I felt funny asking about it so I waited and asked a Soror who is a double-legacy. She asked both her mother and her grandmother and they too answered...
? It has taken a while to get used to the idea, but I think I'm liking the frog thing. It can tie-in in that little frogs reside in the damp shade of thick, healthy ivy. I don't know about the rabbit and mouse, though.