... 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...

... and some unknown site-dependent features. * Author for correspondence (e-mail: [email protected] ) 11 11 2004 © The Company of Biologists Limited 2005 2005 homing pigeon sun compass anosmia visual landmark orientation Kramer's `map and compass' concepts are useful...

... 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...

... olfaction blue petrel Halobaena caerulea zinc sulphate anosmia Kerguelen archipelago Most petrels nest in crowded colonies and return to their nest burrows at night, often when light intensity is reduced by clouds and fog or on moonless nights when it is completely dark ( Warham, 1990...

... 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...

... of the zinc-sulphate-treated birds are due to the lack of navigational information and not to non-specific brain damage caused by the experimental treatment. * e-mail: [email protected] . 30 07 1996 ©The Company of Biologists Limited 1996 pigeon zinc sulphate anosmia...

...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...