Why you "tweet" on Twitter and not twit!

So my roommates and I were discussing study habits and how we only really visit social media sites when we are meant to be studying. Then one of my roommates mispronounced the name Twitter and said Tweeter. This then brought up a discussion of why you tweet but not twit.
So turns out the "twitter" is a verb and also a noun:

Verb (of a bird) Give a call consisting of repeated light tremulous sounds.

Noun A series of short, high-pitched calls or sounds. So you could essentially twitter and not tweet, for example " I twittered about blah blah blah".

However, it turns out tweet is a synonym of twitter, so I guess the makers of Twitter decided that it was better to call it a tweet so as to make their brand less ambiguous; good idea!

Now you cannot twit because it doesn't quite jive with the whole bird sound theme. Twit means:

Noun A silly or foolish person. A state of nervous excitement: "we're in a twit about your visit".

Verb Tease or taunt (someone), esp. in a good-humored way.

Interesting!!!