What is the difference between a blogger and a journalist?

There are no minimum requirements for being a blogger

Anyone can be a blogger. A successful journalist has a talent for presentation and delivery of their material, the best ones can present harsh or unseemly topics in a way to interest audiences of different opinions.

None, if the journalist is the blogger.

Credibility.

Standards.
Ethics.
Style-guide usage.

Journalists generally leave themselves out of their stories.

@Pol_is_aware: I agree with this too, most blogging is akin to an extended online status update or Tweet.

A blogger is someone who does work strictly online. A journalist is someone who can work in multiple fields.

The nature of the editorial process.

One of the most popular columns in InfoWorld magazine is “Notes from the Field” by “Robert Cringely”. A friend of mine wrote the Cringely one week. He said for every other article in InfoWorld, facts have to be verified by two separate sources, but for “Notes from the Field” — a “rumor column — ‘facts’ didn’t have to be verified at all.

Most weblogs are like a rumor column, requiring no factchecking.

In theaters now, “State of Play” starring Russell Crowe and Rachel McAdams, Crowe plays an old-school reporter and McAdams a blogger for the flagship company. The movie sets the two apart quickly when the McAdams character makes an inflammatory blog entry before gathering facts, while the Crowe character was still establishing leads.

although there are some credible bloggers who write just as well as a journalist, i think that a journalists work is a whole lot more credible. anyone can make a blog. it’s so easy to just open up a website, and start writing. this isn’t necessarily a bad thing, but it sure makes it harder to weed out the bullshit (i.e. 95% of blogs).