Normal sudoku rules apply. Digits separated by a black bird are in a 2:1 ratio (one of them is twice the other). Digits separated by a white dropping are consecutive. Not all birds and droppings are shown. The sun is odd.

It really is, though, isn’t it? Giant ball of fire just hanging there in the sky? Anyway, the bird that’s flying alone in the distance is called Maisy. She’s okay, just stretching her wings a little. The other birds don’t hate her or anything. Philip is saving her a spot on the power line, just outside the frame. Philip likes Maisy, even though she’s also a bit odd. None of this is important, I just thought that you might like to know.