Perched on a lofty promontory, it is open to the elements and to transients like birds and squirrels, students and tourists.
Firstly, we assume that the 'search individually and recruit' strategy is ancestral, and that the birds' behavioral responses evolved where roost membership was very transient and therefore birds were unlikely to find themselves at subsequent roosts with the same individuals or kin.
This crowding of wintering species, in addition to the permanent presence of a transient population of birds using wetlands to stop off during migration, could allow AI viruses to circulate and be maintained because of rapid dissemination on shared water.
During oropharyngeal sampling of the naive water contacts, we considered the possibility that we were obtaining transient virus that the birds acquired during recent drinking.
However, our results suggest that this effect is transient, as whilst the birds in our study did have shorter wings at day 100, they had caught up with the control birds by day 200.
We agree that the backpacks have a transient impact on the birds' behaviour, and are currently preparing to address this in a different, not yet published study (Adreani, D'Amelio, Gill, Ter Maat, Gahr).
Thus, the low prevalence found in geese in Denmark might be due to the sampling of a high proportion of transient migratory and apparently healthy birds as well as a possible variation in species susceptibility.
Finally, we recorded from VTA/SNc-projecting neurons in the arcopallium of singing birds and observed fast transient responses to disruptive auditory feedback during singing.
Through analyzing the transient state response of blades impacted by bird and the change of blade profile before and after the impact, the anti-bird impact performance of blades in the first fan rotor is verified.
In contrast to ducks, waders are mainly transient visitors, and only a few individual birds spend the winter in the Camargue.
