Forestry Statistics 2007 - Environment

Biodiversity

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The index for woodland birds is currently based on the average of changes in populations of 33 species, of which 12 are generalists and 21 are woodland specialists (those that breed or feed mainly or solely in woodland). Since the early 1990s the UK woodland bird indicator has remained between 10 to 15 per cent below the level in the early 1970s. Many of the species showing the greatest declines overall are woodland specialists , with Lesser Redpoll, Willow Tit and Tree Pipit declining particularly severely. Against this, other woodland specialists such as Great Spotted Woodpecker, Green Woodpecker and Nuthatch have increased. The index will be revised when next published, to add some extra species for which adequate data are now available.

Table 4.4 UK populations of wild birds

Year

Total breeding birds

Farmland birds

     Seabirds

Woodland birds

Woodland generalists

Woodland specialists

index (year 2000 = 100)

1970

92

174

74110

92

121

1975

102

18681121

113

126

1980

10117088114

95

126

1985

95

130

94

111

93

124

1990

98

120

100105

94

112

1995

95105100949395

2000

100100100100100100

2005

101979710010399

Source: British Trust for Ornithology (BTO), Royal Society for the Protection of Birds (RSPB)

Figure 4.3 Populations of woodland birds


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