... at the colony both during the day and at night. Here, we compared the nocturnal versus diurnal homing schedule of birds treated with zinc sulphate (to induce a reversible but complete anosmia) with that of controls. Our results show that anosmic shearwaters were unable to home in the dark and were constrained...

... sun compass anosmia visual landmark orientation Kramer's `map and compass' concepts are useful tools to explain in general the mechanisms underlying navigation in birds( Kramer, 1953 ). After displacement, homing can take place if a bird is able to establish the new position with respect...

... with shamtreated control birds,we found that anosmia impaired nest recognition only in species that nest in burrows and that return home in darkness. Therefore, petrels showing nocturnal activity on land may rely on their sense of smell to find their burrows, while petrels showing diurnal activity or surface...

.... ( 1992 ). Effects of zinc sulphate-induced anosmia on homing behaviour of pigeons . Comp. Biochem. Physiol . 103A , 519 – 526 . 10.1016/0300-9629(92)90281-T Benvenuti , S. , Ioalè , P. and Massa , B. ( 1993 ). Olfactory experiments on Cory’s shearwater ( Calonectris diomedea...

... gained by different researchers in different regions. We report the results of the first experiments investigating the effect of anosmia on homing pigeons reared in a previously uninvestigated region, southern England. In series 1, experienced birds showed little effect of anosmia induced with zinc...

... pigeons and pigeons given intranasal injections of zinc sulphate to produce anosmia both displayed good homeward orientation and homed rapidly. When released from two unfamiliar locations, in contrast, the controls continued to display good homing performance while the zinc-sulphate-treated pigeons homed...

... ). Effects of zinc sulphate-induced anosmia on homing behaviour of pigeons . Comp. Biochem. Physiol. 103A , 519 – 526 . BENVENUTI , S. , IOALÈ , P. and PAPI , F. ( 1992b ). The olfactory map of homing pigeons . In Chemical Signals in Vertebrates VI (ed. R. L. Doty and D...

...Wolfgang Schlund ABSTRACT Depriving homing pigeons of olfactory information by applying a local anaesthetic, gingicain, to their olfactory epithelium results in systemic effects. Furthermore, anosmia persists reliably for only an hour. In contrast, intra-nasal irrigation with 18 % zinc sulphate...