Strains that infect birds, however, only rarely jump directly to people, as happened in Hong Kong last year.
In birds however, only ambiguous evidence exists for pigeons Columba livia [4], [7] and anecdotal evidence for grey parrots Psittacus erithacus [28].
In our transmission experiments with vaccinated birds, however, only a minority of the birds died during the experiments.
However, the birds still only occupy about two-thirds of their traditional territories, with particularly low numbers in the east of Scotland.
Those in search of birds, however, often enjoy only the briefest of sightings.
Interestingly, singing decreased FoxP2 in both hearing and deafened birds, however, levels were only correlated with the amount of singing in hearing birds.
The only birds, however, to put in an appearance were those brought by the Trefflich Bird & Animal Company - 11 green parrots and one red macaw.
Compared to lowland birds, however, highland species are not only more sensitive to temperature changes, but their populations also are more isolated from each other, as mountains effectively constitute habitat islands surrounded by a sea of hotter lowlands.
Remarkably, however, only two birds known to have been banded as chicks in Japan have been observed to be breeding in Midway, Hawaii, in 2014 and 2015 (K. Yoshiyashu and S. Doell, pers. comm).. Apparently, these two migratory events are the only ones recorded thus far (B. Flint, pers. comm).
When only the un-baited cup was lifted, however, only one bird chose the baited cup significantly above chance.
However, only two species of bird have previously been used in loading experiments, the cursorial guinea fowl (Numida meleagris) and the locomotor-generalist barnacle goose (Branta leucopsis).
