The median difference in the latency to attack prey for the novel person (day 8) minus latency for the last day familiar person (day 7) for fast and slow birds.

<p>Positive values indicate that birds took longer to attack prey when the novel observer was timing the birds compared with a familiar observer. The box indicates the first and third quartiles whilst the bars indicate the 10^th and 90^th percentiles.</p

The median latencies over the course of the 8 days of the experiment for slow birds (solid line and filled symbol) and fast birds (hashed line and unfilled symbol).

<p>The bars represent the 10^th and 90^th percentiles. It is interesting to note that the latencies for the fast birds reach an asymptote on day 2 whereas slow birds reach their asymptote on day 3 of the experiment.</p