I found this White-M Hairstreak hiding in the grass near the boat yard. It looks a lot like the more common Gray Hairstreak, but the iridescent blue in the torn wing is a give away. It's a new butterfly for my list. I've been looking for it for a long time!
I put it out for identification by pros on the Calvert Fossils Facebook group. It's been identified as the axis vertebra (the second vertebra, that attaches to the skull) of a baleen whale.
The Axis (C2 vertebra) also known as epistropheus forms the pivot upon which the first cervical vertebra (the Atlas), which carries the head, rotates.
spotted another a step away.