I'm not sure if this is the right answer based on your question but cicades flies leave their exoskeleton on trees when they "molt" and become adults. Much like a catepillar becomming a butterfly.
June bugs also display this.
A Cicada.
The name of the black bug with a hard shell is a beetle.
A bug that's green as leaves and green like leaves
Sumac
A stink bug.
Yes
to protect it
no they don't
The long, skinny black bug with a hard shell is commonly known as a "beetle."
Box Elder (Bug and Tree) I went to Box Elder High School. :-)
The tree you are referring to is likely a sweetgum tree (Liquidambar styraciflua). It is deciduous with palmate leaves that turn vibrant colors in autumn. The spiky balls containing seeds are known as sweetgum balls, but they are not edible.
its a bug