Now that's weird. I've less than, I think, 1500 blog entries--certainly less than 2000 since 16th of September...and had 3027 page views on Sunday--and a bit over 325 visitors. This is the third day in a row, that my stats have gone utterly mad. Hopefully, yesterday was the end of it. Not that I'm objecting, but now I'm worried that the website won't be able to handle that many page views in a day--robots or not.
I honestly would be very surprised if it was a human doing this, because I don't see how any one person could possibly view over 2000 blog pages in one day--and nobody's blog could be that riveting, especially mine, ha-ha.
But, it is odd, isn't it?
Blog uk doesn't seem to have a clue about this, other than suggesting Googlebots. But would search engine robots take three or more days to pour through my blog page entries?
Write on one side of the paper only, extra credit if you can name all the 7 dwarfs... 
magnox
But, I'll grade you on a curve and give you an 'A+' anyway. 
Search engines crawl in many different ways - Google's bots often seem to swarm out once a week, and they won't affect the server traffic as they're not really hauling up page views as such. They're filing away the content...
It could also be spambots looking for email addresses, but either way I wouldn't get too bothered !