How did the pigeon mark my window?

Question

On my French windows this morning is the perfect pattern of a pigeon in flight, right down to the wingtips.

Bird strikes happen from time to time, but they have never left such a clear pattern before. What was special about this one?

Answer 1

Its the dust from their feathers. Next time take a photo and transfer it to a piece of card. Makes a fair picture to hang.

Answer 2

it mighta been dirty or wet. or someones out in the middle of the night drawing around a pigeon just to make you think.

Answer 3

They are covered in a natural powder which keeps the feathers in a healthy condition and also waterproofs them.

Answer 4

I've had them too - kitchen window - and found the dead bird outside!