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Fig. 5. (A) Relationship between downwind approach distance d and
nest-feeder distance D. Same data set as in
Fig. 4. Dotted line indicates
the best-fit regression (d=0.4D+0.56), thin lines mark 95%
confidence intervals. Measurements for each individual were pooled before
calculating means, S.D. and regression line. (B) Relationship
between the scatter of the downwind approach distance d and the
nest-feeder distance D. Same data set as in A and
Fig. 4. The dotted line
indicates a trend line (scatterd=0.008D+0.443, values in
m; a regression line was not constructed since the data points were not
normally distributed, because the scatter was calculated as absolute values of
the difference between d and the mean of d). 25% and 75%
percentiles are given. The values for 40 m nest-feeder distance showed
unusually high scatter, as a result of the experimental conditions; see
text.
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