2002: Behavioural evidence for ultraviolet vision in a tetraonid
species foraging experiment with black grouse Tetrao tetrix.
The clockwork of Finnish tetraonid
Possible viral reservoirs of SINV are tetraonid
and migratory birds, which are a major blood source for mosquitoes and have been shown to harbor SINV antibodies (3,11,12).
1981: Fluctuations and long-term trends in the relative densities of tetraonid
populations in Finland, 1964-77.
1966: (In Finnish with an English summary: The number of tetraonid
birds and their occurrence in various habitat types in the Oulu district according to compass line census).
hares, rodents, and tetraonid
birds, remain enigmatic.
These coincided with years of general tetraonid
Population cycles are common in boreal herbivorous rodents, lagomorphs, and tetraonid
birds, such as Red Grouse (Williams 1985), and their predators (Keith 1963, Sinclair et al.
Prey species diversity was relatively high among birds compared to mammals, with Chukar Partridge (Alectoris chukar), tetraonids
, Great Horned Owls (Bubo virginianus), and corvids most abundant.
For a number of declining bird species such as woodpeckers, tetraonids
, and farmland birds, the population indices derived from the point count schemes have been used for the assessment of population status.
1952: Fluctuations in the numbers of British tetraonids
Both species showed the very low mid-1940s trough previously recorded for tetraonids
in much of northwest Europe.