Bird Population Changes for the Years 1973–74

Bird population changes for the years 1979–80

“…Table VI provides corresponding data for some 'scarcer species' whose population changes have been assessed by combining data from all habitat types. Indices for the years 1962-1974 inclusive are given in Batten and Marchant (1976), while the 1975-79 values can be found in Marchant (1977a, 1977b), Marchant (1978) and Hyde (1980a, 1980b). Previous index values for Sparrowhawk were given by Marchant (1980).…”

The food of suburban foxes (Vulpes vulpes), with special reference to London

“…For each year a mean figure was used, based on the data for song thrush, blackbird, robin and starling, four of the species frequently found in the stomachs or outside natal earths of London foxes. The Woodland Bird Indices for the years 1971 to 1977 are given in Batten (1972aBatten ( , 1973a, Batten & Marchant (1975, 1976, 1977a, 1977b and Marchant (1978). For the years 1971 to 1977 inclusive, there was no correlation between the Woodland Bird Index and the mean birth litter size (r = -0.126) nor with productivity (the mean number of cubs born per vixen, including barren vixens); T = 0.67.…”

Habitat occupancy and regulation of clutch size in the European KestrelFalco tinnunculus

“…This is sufficiently sensitive to detect large population changes among Kestrels but its possible sensitivity to differential representation of habitats in the index plots from year to year make for rather wide confidence limits, eg. limits of -23% and +12% for 1973-74 (Batten and Marchant 1976). Values for 1962 and 1963 have not been published previously because of their small samples of plots with Kestrels, but were computed for the present study to extend the run of population data available.…”