It could mean that the bird sees its reflection in the window and thinks that it is seeing another bird, or it could mean that, at some time, someone put out bird seed onto your window sill.
That the bird did not see the window. Or it was sick / tired / dying already. Put bird stickers on the window to prevent it from happening again!
That it needed a little rest. Ground to window, window to nest. Their little lungs are so small they can only do so much before getting tired.
the bird likes the look of your window
that you need to close your window!!
It means that was a tough and lucky bird. Other than that it means nothing whatsoever.
Is it bad luck for a bird to fly into a window and die
It might have just been a stupid bird or it might have short sight or it might have seen its reflection and thought it was another bird it all depends on what type of bird it was.
Birds are stupid.
it means that a small yellow bird is on your window screen
it is seeing itself and thinks it is another bird it poops allover your car while it is doing this.
A bird will fly outdoors or indoors, birds just fly.
It means it was momentarily shocked to see you sitting there, it probably wasn't expecting it... it's just a bird.
This means that there is a bird there or that there is a bird close making the shadow.
it means that the fly would come back in 12 seconds but it wont be on your foot..
it means its looking for a good place dump, maybe it likes the feel of your car; might be a good time to drive away before it takes a nice dump on your window.
dead