No, its not a snake; it is a most perfect specimen of a horse-fly.
And here is a picture of the lancet or knife of a horse-fly.
Finding that she did not yet comprehend him, he exclaimed: "Why, girl, did you never see a horse-fly?"
The blue-bottle one could hear and avoid; but the attack of the horse-fly was stealthy.
They knew there was a species of horse-fly in the Himalayas—greatly dreaded by all animals, and even by man himself.
First he turned himself into a horse-fly, and hid himself in Dapplegrim's left nostril.
But as Brok blew the bellows, and his brother gazed into the glowing fire, the horse-fly came again.
It is as large as a horse-fly, and when it bites a victim it usually draws blood.
Cuvier laboring to distinguish a horse-fly from a blue-bottle, or dissecting a spider with a rusty nail?
A horse-fly was teasing the shuddering back of his horse, and he deftly flicked at it with his whip till he had knocked it away.