Results

The latest BBS report includes an annual update of population trends, specifically along waterways, for 24 species with the strongest association with that habitat type. These trends are repeated in the table below. Trends are derived from the entire WBBS data sets, and date back to 1999.

Key findings

  • The steepest long-term decline has been for Lapwing, with a 54% decline recorded from 1999 to 2015.
  • Along with Lapwing, Oystercatcher (-35%), Curlew (-47%) and Common Sandpiper (-28%) have undergone declines 1999 to 2015.
  • Whitethroat has increased by 25% (1999 to 2015). Compared to the UK Breeding Bird Survey results - which surveys birds in all habitat types – Whitethroat showed a similar increase of 30% in the UK.

The trends below are taken from the latest Breeding Bird Survey Report.

See BirdTrends for details of methodology and a discussion of each species' results in a wider context.

Species Sample 2015-2016 Sig 1999-2015 Sig LCL UCL
Mute Swan 111 -13 -12 -34 20
Greylag Goose 52 -51 73 -10 223
Canada Goose 97 24 * 64 -4 166
Mallard 232 -9 * -1 -11 12
Tufted Duck 44 -24 -35 -61 24
Goosander 53 -11 16 -21 59
(Cormorant) 67 15 -1 -26 37
(Grey Heron) 174 -12 -30 * -40 -17
Moorhen 147 -4 -23 * -35 -10
Coot 70 -2 -24 -51 6
Oystercatcher 76 6 -35 * -48 -17
Lapwing 82 -9 -54 * -70 -32
Curlew 62 11 -47 * -62 -28
Common Sandpiper 69 -15 -28 * -40 -14
(Common Tern) 31 -14 -11 -40 35
Kingfisher 71 23 -19 -39 2
Sand Martin 76 43 * -5 -47 68
Grey Wagtail 128 9 -9 -24 10
Pied Wagtail 156 -9 -23 * -37 -2
Dipper 91 3 -10 -29 16
Sedge Warbler 91 2 -45 * -56 -32
Reed Warbler 56 15 * -11 -30 13
Whitethroat 127 -4 25 * 6 46
Reed Bunting 112 2 -3 -16 10

This tables shows percentage changes in bird populations during the specified period.

Trends are marked with an asterisk (*) where the 95% confidence limits of the change do not overlap zero (indicating that there has been a significant change).

The trend since the start of the survey, covering the years 1998–2016, has been smoothed, and the end years truncated. This trend is labelled as Change 99–15.

The sample is the mean number of squares per year on which the species was recorded during 1998–2016.

LCL and UCL are the lower and upper 95% confidence limits for the 1999–2015 change.

Trends for species in brackets are reported with caveats: Cormorant, Grey Heron and Common Tern are reported with the caveat that counts may contain a high proportion of birds away from breeding sites.