Are those spiders, ticks, or other insects on the basement window? What's the best way to get rid of them?

Hey, I have these little pests on my window and I'm worried that they'll eventually find their way through the screen. I've stuck a fine mesh screen to the window, but the tangle has created small openings and entrances for these insects. Does anyone know if they are spiders, ticks or maybe even lice? How…