Table 1.

Summary of homing results from pigeons released at two sites

Release siteGroupNnαrhcvt (s)hp (km h−1)
MarinellaSS1212173°0.84***+0.79***169″Day after
Pooled resultsSS2424031°0.41*+0.35**218″Day after
  • Bolgheri release site: home direction 336°, distance, 54.8 km, date of release, 5/8/05; Marinella release site: home direction 154°, distance, 57.4 km, date of release, 13/8/05.

    Groups: SS, sham operated control pigeons; V1, pigeons subjected to the resection of the ophthalmic branch of the trigeminal nerve; ON, pigeons subjected to the resection of the olfactory nerve.

    N, number of birds released; n, number of birds for which the initial orientation was recorded; α, mean vector direction; r, mean vector length; hc, rcos(α-β), whereβ is the home direction; vt, median vanishing time (s); hp, homing performance: median homing speed in km h−1 is reported when available; `day after' and `lost' means that more than half the birds homed the day after the release, homed in the subsequent days or were lost; asterisks in the r and hc columns indicate the results of the Rayleigh and V-test respectively; *P<0.05, **P<0.01, ***P<0.001.