Notice that the objects are actually in front of the Sun and are not dirt on the window.
The objects appear to be using the sun’s light to hide themselves in.
That is obvious to comprehend when I zoom in and out and the objects stay the same size in relation to the sun. See the screen captures photos below.
This the sun rising over the Halifax Nova Scotia harbour facing south looking over the Atlantic ocean.
This first photo is a full sized high resolution downloadable photo. just right click.
this second photo is a video screen capture..
Click on thumbnail. Press F11 for full screen.