SHIFT TO VERTICAL WEBS. “Vertical orientation not only helps araneoid orb-webs intercept more prey but also to retain them for longer, as escaping prey are more likely to fall into lower parts and become re-entangled. A vertical web may intercept more prey; however, such prey are typically larger, faster flying insects that impact the web with greater energy. This shift to a vertical web orientation was facilitated by a major shift in the type of capture silk used in the web.”
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