A spider spinning a web needs something to anchor the web to. In nature a tree branch with a fork in it, that yields two branches maybe a foot apart works well. A lot of other spiders have to make do with less. I see them jumping off my eaves, trailing a thread of silk. The lucky ones land on my deck railing, the unlucky ones just get blown away. Even the lucky ones are not that lucky. It is a good ten feet from my eaves to the deck railing. I never see the spiders climbing back up to spin a second thread. They need two anchor threads to keep the web spread out. I don’t think spiders can see from my eaves to my deck railing. I think they are just casting themselves to the winds, hoping for the best.
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