Why when you use twitter is it called tweeting and not twitting?

[defiorephoto]

There are a few reasons. First, to twitter is something that happens when a lot of birds begin tweeting at once. A collective form of tweet, if you will. So each individual broadcast is a tweet. Also, twit is altrady taken in the noun form as a derogatory, so to call it twitting would not be good PR. Finally, they woudln't call the website "tweeter" since that's the term for a small speaker for high frequencies.