A storytelling mosquito isn't so weird an idea as you might think. There are stories told from the viewpoint of animals and even inanimate objects (like a teapot or even a 100$ bill.) It is one of the oldest storytelling devices: A Fable.

You could adopt a third person descriptive mode or actually use a blood sucking mosquito as a commentator/narrator which, I'm sure, would have something witty or wise to say about the world. You would not have to worry about an insect having 'human sight and a vocabulary as well as the human anatomy’, unless you wanted to write a SF story.

Done with pejanon's input, story is now 1780 words, original was 1681. Why do they always grow so easy when I revise them?
Two reasons I know of: a) Because they are bad and we try to fix them by building up, patching, explaining, doing a new, thick, paint job on a cracked wall, instead of going back to the foundations. b) Because they are good and we feel there is always something more to say and yet another detail to refine.

Your story is the second type. Yes, now it is both sleek and solid with no important loose ends. This is the ‘encapsulated universe’ story. The universe exists only to provide a plausible stage for the story and any hints that other things exist would be just a distraction, or lead to an entirely different story. No, it is not perfect but you are aware of it and that is important.

Well, there is a third reason why they grow: we like to babble.

Speaking of babbling, mosquitoes and whips… check out your next chalenge.