Different Bing Lock screen images

[Ejay Lozano]

When changing you lock screen to the Bing lock screen, on a daily basis the image changes. Usually when you tap the Bing search button the background image is the same as your lock screen. I noticed sometimes there's different images that aren't the same. Today has 2 different images:
Lock screen:

Bing search:

 

[prasath1234]

I do not know same thing happens to me.

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[Ejay Lozano]

Google lock screens? Now that will cause a controversy...

 

[Mattman86]

I noticed that too... The only thing I can think of is that Microsoft is trying to give us some variety.

 

[Zeem Frostmaw]

From what I can tell the Bing Search image is the actual Bing.com image of the day. No idea where the other comes from, though sometimes it appears on Bing as the actual image a couple days later.