Answer:
What is long and slim, works in light. Has but one eye, and an awful bite?
I'm not man's best friend, I'm their enemy, I can mark your end, yet you do not see me, I am very small, but very tough, If you have me, then you have it rough.
Long and slinky like a trout, never sings till it's guts come out.
I have four wings but cannot fly. I never laugh and never cry. On the same spot always found, toiling away with little sound.
I am what remains when nothing is left.What am I?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.