I typically assume it's a non-native speaker with things like this, but I'm not sure in this case.

I'd read this with commas around 'like', rather than with a period after it: "... how birds look, like, I'm afraid" works as a sentence while "... how birds look like. I'm afraid" is both wrong, like you point out, but also sounds much more serious than the jokey tone I'd expect from a message without punctuation and capitalization

Did you understand what was being communicated? Yes? Congratulations!

Because, really, that's generally all that's necessary.

Multi-track drifting

No they're asking how do birds look like the way they do. In which case the answer is that a bird's body evolved to be streamlined and lightweight in order to fly more efficiently. /s

No one cares mate.

It's fine to correct the grammar of children in your care, but not really in other circumstances.