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. 1997 Feb 1;109(2):129–140. doi: 10.1085/jgp.109.2.129

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Segment direction relative to the bee line. x-axis: angle between bee-line and segment orientation, ϕ[deg]. y-axis: probability density [deg⁻¹]. ϕ is computed via the scalar product. 0 deg indicates parallel orientation, 180 deg parallel-opposed orientation. (solid line) tree with ξ^low = 0; (dashed line) tree with ξ^low = 0.4.