What is this bird meme that's all over Facebook?

Trash Dove

It's a sticker from a Facebook sticker set called Trash Dove, and started becoming viral few days ago in Thailand.

As for how it is popular, it is because some people somehow found the sticker (this one in particular) very annoying (well including me). Many other people think the sticker is cool and/or it's funny how someone got annoyed over this and began spamming with it in comments section. This went viral when popular Facebook pages joined the spamming festival and soon enough it's all over Facebook.

On a side note, there's also an issue where the sticker creator Syd Weller posted a thank you image for Thai people who made it so popular. The image is the Trash Dove holding Thai flag with its leg, which some Thai people found offensive*. Some other people think it's nonsense to get offended over this, so as a result, there was a number of dramas in Thai Facebook about the issue. In the end, Syd Weller apologized for it on her Facebook page and changed the image to this.

 the sticker creator Syd Weller