Twitter’s brand and image, which used to be a blue bird, have been changed to a “X.”

On the PC version of the social network, the blue bird has been replaced by a new white X on a black background. This change has not yet been made to the mobile app.

Elon Musk, who owns Twitter, says that “tweets” will be changed to “x’s” and that posts will be called “x’s.”

The billionaire updated his Twitter bio to include “X.com” and changed his profile picture to the new image.

Mr. Musk wants to make a “super app” called X. This is his idea for a new kind of social media platform, which he has been talking about for months.

On Sunday, the investor tweeted that he wanted to change Twitter’s logo. He wrote, “Soon we will say goodbye to the Twitter brand and all the birds, one by one.”

Then he posted a picture of the new X logo being shown on the side of Twitter’s San Francisco office.

Mr. Musk changed the business’s name to X Corp and said that the switch “should have been made a long time ago.”

He put up a picture of a flashing X on Twitter, and when asked in a Twitter Spaces audio chat if the Twitter logo would change, he said “Yes.”

On the site, Ms. Yaccarino wrote that the rebranding was an exciting new chance.

“Twitter had a huge effect and changed the way we talk to each other,” she said.

“X will now go even further and change the global town square.”

The bird’s name is Larry, which Twitter co-founder Biz Stone said in 2011 is a tribute to Larry Bird, a famous basketball player who played for the Boston Celtics.

People, including Martin Grasser, who made the image in 2012, lamented its loss on Twitter.

“Today, we’re saying goodbye to this great blue bird,” he said. Later, Twitter’s best-known co-founder, Jack Dorsey, shared the tweet.