Table 3 Measured friction performance of whole tree frogs (top) and of single limbs/toe pads (bottom; SP unless stated otherwise). For explanation of abbreviations see Table 2
From: Tree frog attachment: mechanisms, challenges, and perspectives
Reference | Species | Friction F∥ | Shear stress σ∥ | F ⊥,L | v ∥ | Remarks |
|---|---|---|---|---|---|---|
[mN] | [mN mm −2] | [mN] | [µm s–1] | |||
[40] | various hylids | 5.5–585.7 | — | — | — | PMMA |
[71] | L. caerulea | 285.4  ± 94.5 | — | — | — | Glass |
[6] | O. septentrionalis | 24.9  ± 6.6–55.4 ± 6.3 | — | — | — | SL |
3.0–130.3 | — | 2.5 | 10–2500 | |||
[10] | R. pardalis | — | 1.5 | — | — | Glass |
[25] | L. caerulea | — | 1.08–2.01 | 0.1 | 500 | Glass |
[39] | R. dennysi | 25.1–51.2 | 9.6 | 2 | 600 | Varying detachment kinematics |
[46] | H. versicolor | 357.1 | — | — | — | Pulling experiment, Frontlimbs |
[53] | P. megacephalus | 17.52 | — | 3 | 300 | Glass |
[80] | T. resinifictrix | 110–1270 | — | — | — | Jumping kinematics, Wood; SL |
[97] | L. caerulea | — | 7.8  ± 12.9 | 2 | 1000 | Resin |
— | 5.9  ± 2.6 | PDMS | ||||
[113] | L. caerulea | 1.6–10.4 | — | — | — | SL |
[112] | P. megacephalus | 14.5–122.7 | — | — | — | Repeated sliding |