Fig. 2: Measured swooping trajectories of perching Harris’ hawks. | Nature

Fig. 2: Measured swooping trajectories of perching Harris’ hawks.

From: Optimization of avian perching manoeuvres

Fig. 2

a, Ontogeny of 45 flight trajectories recorded at a perch spacing of 12 m during the initial familiarization period for juvenile bird ‘Toothless’; earlier flights are shown in red, with later flights shown in blue. Note the more direct trajectory taken on earlier flights and quick acquisition of a swooping trajectory characteristic of experienced birds. b–e, Spatial histograms showing pooled trajectory data from n = 1,585 flights for all n = 4 hawks at a perch spacing of 5 m (b), 7 m (c), 9 m (d) and 12 m (e); see supporting code (https://doi.org/10.6084/m9.figshare.16529328). These spatial histograms do not include trajectories recorded during the initial familiarization period.

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