Nobody's Fault But Mine...

My defect is that I'm brown and yellow,
My flaw is that I slither along a crooked line.
My weakness is that I ain't a looker,
Nobody's fault but mine...

My bad luck I'm not bigger,
My vile fortune, on rats I don't dine.
My ill fate I feed on smaller prey,
Nobody's fault but mine..

My rotten luck to have been there,
My abysmal fortune, at the wrong time.
My doomed stars to have been under his blow,
Nobody's fault but mine..

Don't they understand that I am harmless?
Should I move with a 'I am non-poisonous' sign?
Ah, who am I kidding? I'm a snake,
Nobody's fault but mine...