We have this tiny spider living in a window vent, in our bathroom. It has made a small web in the corner of the window, above the vent, and waits there all day for prey. Sometimes, when we go into the room, it rushes to hide inside the vent, other times it just hangs in its web. As a spider grows it sheds its skin, so we have been fortunate to observe that process too. When we first saw the spider its body was about 2mm long (+ legs) and after each skin-shed it has grown another 1mm in length.
Click on each picture to see a larger view......................