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Fig. 2. Series 1. Pooled homing performance from Marinella, Agliana and Bolgheri.
Each symbol identifies the performance of one pigeon. C, intact control
pigeons; V1, pigeons subjected to the section of the ophthalmic branch of the
trigeminal nerve; ON, pigeons subjected to the section of the olfactory
nerves; km h–1, mean homing speed of the birds that homed on
the day of the release; 1 day, pigeons that homed on the day after the
release; later, pigeons that homed later than the day after the release; lost,
pigeons that never returned home. Pigeons that homed together are not included
in the diagrams.