Elon Musk introduces a new 'X' logo to replace Twitter's blue bird.

Twitter, goodbye. Good day, X. Elon Musk has introduced a new "X" logo to replace Twitter's iconic blue bird, as part of a massive rebranding of the social media site he purchased for $44 billion last year.

On Monday, the X appeared at the top of the desktop version of Twitter, while the bird remained dominating in the smartphone app. 

Meanwhile, at Twitter's San Francisco offices, employees were observed removing the iconic bird and logo on Monday until police arrived and stopped them

because they didn't have the necessary permits and didn't tape off the pavement to keep pedestrians safe if anything dropped.

The "er" at the end of Twitter remained visible as of early afternoon.

The clumsy eradication of both real and virtual relics of Twitter's past was emblematic of Musk's unstable management of the firm since his reluctant acquisition.

"It's the end of an era, and it's a clear signal that the Twitter of the past 17 years is gone and not coming back," said Insider Intelligence analyst Jasmine Enberg. 

 "But the writing was on the wall: Musk has been vocal about transforming Twitter into platform X from the beginning, and Twitter was already a shell of its former self."

"And soon we shall bid adieu to the twitter brand and, gradually, all the birds," Musk said on Twitter on Sunday.

"I can't say I'm surprised, but I think it's a very selfish decision," said Hannah Thoreson of Baltimore, Maryland, who has used Twitter for both business and personal reasons since 2009.

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