How do you tell a snapping turtle from a box turtle?

Snapping Turtles have...

• large, bulky, heads
• really long tails
• grey skin
• ridged and spiky shells
• sharp, pointed beaks
• wild ones usually act aggressive with the signature snap
• they can not with draw their head into their shell
• long necks
• there is a gap between the head and the top of the shell