Table 2.

Equations for six features used to calculate summary statistics for behaviour events.

Feature	Equation
ODBA	$=\left|{\mathrm{X}}_{\mathrm{dyn}}\right|+\left|{\mathrm{Y}}_{\mathrm{dyn}}\right|+\left|{\mathrm{Z}}_{\mathrm{dyn}}\right|$
VeDBA	$=\sqrt{{\mathrm{X}}_{\mathrm{dyn}}^2+{\mathrm{Y}}_{\mathrm{dyn}}^2+{\mathrm{Z}}_{\mathrm{dyn}}^2}$
Movement variation	$=\left|{\mathrm{X}}_{\mathrm{i}+1}-{\mathrm{X}}_{\mathrm{i}}\right|+\left|{\mathrm{Y}}_{\mathrm{i}+1}-{\mathrm{Y}}_{\mathrm{i}}\right|+\left|{\mathrm{Z}}_{\mathrm{i}+1}-{\mathrm{Z}}_{\mathrm{i}}\right|$
Energy	$={\left({\mathrm{X}}_{\mathrm{i}}^2+{\mathrm{Y}}_{\mathrm{i}}^2+{\mathrm{Z}}_{\mathrm{i}}^2\right)}^2$
Pitch	$={\tan }^{-1}\left(-\frac{{\mathrm{X}}_{\mathrm{i}}}{\sqrt{{\mathrm{Y}}_{\mathrm{i}}^2+{\mathrm{Z}}_{\mathrm{i}}^2}}\right)\times 180/\mathsf{\pi }$
Roll	$=\mathrm{atan}2({\mathrm{Y}}_{\mathrm{I}},{\mathrm{Z}}_{\mathrm{i}})\times 180/\mathsf{\pi }$