Morphological evolution of spiders predicted by pendulum mechanics.

The inclusion of carapace width (body size) in a multiple regression model along with the OLS residuals (which remained highly significant– b = 1.17; P <0.0001) also significantly and positively explained bridging speed ( b = 1.05; P = 0.005).

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Finally, when suspensory spiders are induced to run on the ground, there is a clear trend in which larger suspensory spiders tend to run much more slowly than similar-size spiders that normally move as inverted pendulums (i.e., wandering spiders).

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