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CBC/BBS alerts & population increases

1a.   CBC/BBS UK alerts – long term
1b.   CBC/BBS England alerts – long term
2a.   CBC/BBS UK alerts – 25 years
2b.   CBC/BBS England alerts – 25 years
3a.   CBC/BBS UK alerts – 10 years
3b.   CBC/BBS England alerts – 10 years
4a.   CBC/BBS UK alerts – 5 years
4b.   CBC/BBS England alerts – 5 years
5a.   CBC/BBS UK population increases of >50% – long term
5b.   CBC/BBS England population increases of >50% – long term

1a. Table of population alerts for CBC/BBS UK 1967-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 49 99 -98 -99 -96 >50  
Grey Partridge 49 141 -92 -94 -88 >50  
Willow Tit 49 42 -92 -97 -85 >50  
Spotted Flycatcher 49 133 -87 -91 -81 >50  
Corn Bunting 49 81 -87 -95 -77 >50  
Marsh Tit 49 105 -80 -87 -74 >50  
Little Owl 49 62 -72 -82 -52 >50  
Yellow Wagtail 49 91 -72 -87 -47 >50  
Whitethroat 49 730 -60 -71 -46 >50  
Yellowhammer 49 640 -58 -67 -47 >50  
Greenfinch 49 914 -56 -64 -43 >50  
Mistle Thrush 49 630 -54 -63 -44 >50  
Lapwing 49 346 -53 -72 -29 >50  
Song Thrush 49 1085 -47 -55 -36 >25  
Sedge Warbler 49 169 -35 -66 -5 >25  
Dunnock 49 1119 -33 -41 -22 >25  
Bullfinch 49 386 -33 -46 -18 >25  

1b. Table of population alerts for CBC/BBS England 1967-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 49 98 -98 -99 -96 >50  
Tree Sparrow 49 105 -96 -98 -91 >50  
Nightingale 49 24 -93 -98 -69 >50  
Spotted Flycatcher 49 99 -93 -96 -89 >50  
Willow Tit 49 39 -93 -97 -87 >50  
Grey Partridge 49 126 -92 -95 -88 >50  
Starling 49 726 -89 -92 -86 >50  
Tree Pipit 49 52 -86 -93 -75 >50  
Lesser Redpoll 49 52 -85 -94 -71 >50  
Corn Bunting 49 77 -85 -93 -76 >50  
Marsh Tit 49 96 -78 -86 -71 >50  
Cuckoo 49 309 -77 -83 -70 >50  
Linnet 49 531 -71 -79 -62 >50  
Yellow Wagtail 49 89 -70 -86 -42 >50  
Little Owl 49 59 -68 -83 -48 >50  
Willow Warbler 49 534 -64 -75 -52 >50  
Skylark 49 720 -63 -70 -56 >50  
Yellowhammer 49 556 -62 -71 -53 >50  
Mistle Thrush 49 506 -60 -67 -50 >50  
Whitethroat 49 629 -60 -72 -47 >50  
Greenfinch 49 774 -50 -62 -34 >25  
Song Thrush 49 858 -48 -57 -39 >25  
Meadow Pipit 49 225 -46 -75 -18 >25  
Sedge Warbler 49 112 -41 -73 -14 >25  
Bullfinch 49 308 -38 -52 -18 >25  
Lapwing 49 292 -37 -68 -6 >25  
Dunnock 49 918 -37 -46 -26 >25  

2a. Table of population alerts for CBC/BBS UK 1991-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 25 130 -95 -97 -93 >50  
Willow Tit 25 48 -87 -92 -81 >50  
Grey Partridge 25 211 -68 -76 -60 >50  
Little Owl 25 93 -60 -71 -48 >50  
Yellow Wagtail 25 150 -56 -72 -43 >50  
Spotted Flycatcher 25 184 -56 -67 -44 >50  
Marsh Tit 25 152 -53 -61 -44 >50  
Greenfinch 25 1650 -50 -55 -44 >50  
Corn Bunting 25 133 -49 -64 -29 >25  
Lapwing 25 622 -41 -50 -30 >25  
Mistle Thrush 25 1093 -36 -42 -29 >25  
Yellowhammer 25 1117 -36 -43 -30 >25  
Tawny Owl 25 105 -30 -46 -10 >25  

2b. Table of population alerts for CBC/BBS England 1991-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 25 128 -95 -97 -92 >50  
Willow Tit 25 43 -89 -94 -83 >50  
Spotted Flycatcher 25 130 -76 -83 -70 >50  
Tree Pipit 25 72 -73 -83 -58 >50  
Starling 25 1315 -73 -77 -70 >50  
Cuckoo 25 511 -70 -74 -66 >50  
Lesser Redpoll 25 62 -69 -89 -41 >50  
Grey Partridge 25 189 -67 -75 -59 >50  
Nightingale 25 33 -67 -77 -42 >50  
Little Owl 25 90 -56 -66 -44 >50  
Yellow Wagtail 25 147 -56 -69 -44 >50  
Marsh Tit 25 139 -49 -59 -38 >25  
Corn Bunting 25 127 -48 -66 -31 >25  
Greenfinch 25 1395 -47 -54 -40 >25  
Mistle Thrush 25 869 -46 -51 -40 >25  
Willow Warbler 25 889 -45 -53 -39 >25  
Yellowhammer 25 970 -44 -50 -38 >25  
House Martin 25 663 -35 -59 -4 >25  
Meadow Pipit 25 407 -34 -48 -16 >25  
Tawny Owl 25 91 -31 -44 -11 >25  
House Sparrow 25 1229 -30 -42 -16 >25  
Lapwing 25 523 -28 -42 -12 >25  
Skylark 25 1305 -28 -34 -21 >25  
Garden Warbler 25 360 -27 -37 -15 >25  

3a. Table of population alerts for CBC/BBS UK 2006-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 10 80 -84 -90 -79 >50  
Greenfinch 10 2168 -65 -66 -63 >50  
Willow Tit 10 40 -48 -62 -32 >25  
Little Owl 10 95 -46 -54 -34 >25  
Marsh Tit 10 166 -37 -46 -27 >25  
Grey Partridge 10 229 -36 -43 -27 >25  
Lapwing 10 797 -33 -40 -25 >25  
Moorhen 10 774 -25 -30 -20 >25  

3b. Table of population alerts for CBC/BBS England 2006-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 10 79 -84 -89 -77 >50  
Greenfinch 10 1836 -63 -64 -61 >50  
Willow Tit 10 36 -55 -69 -38 >50  
Little Owl 10 92 -47 -56 -37 >25  
Spotted Flycatcher 10 125 -43 -53 -35 >25  
Grey Partridge 10 207 -37 -46 -29 >25  
Cuckoo 10 512 -37 -43 -32 >25  
Starling 10 1639 -37 -41 -34 >25  
House Martin 10 859 -31 -36 -26 >25  
Lapwing 10 684 -30 -35 -24 >25  
Marsh Tit 10 153 -29 -40 -18 >25  
Sparrowhawk 10 346 -27 -33 -20 >25  

4a. Table of population alerts for CBC/BBS UK 2011-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 5 44 -57 -73 -43 >50  
Greenfinch 5 2017 -45 -46 -42 >25  
Marsh Tit 5 161 -27 -35 -18 >25  

4b. Table of population alerts for CBC/BBS England 2011-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 5 42 -57 -70 -40 >50  
Greenfinch 5 1717 -43 -44 -40 >25  
Willow Tit 5 28 -28 -44 -4 >25  
Nightingale 5 41 -26 -45 -11 >25  

5a. Table of population increases of >50% for UK CBC/BBS 1967-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Robin 49 1273 57 44 74    
Pied Wagtail 49 649 74 26 136    
Great Tit 49 1186 89 64 117    
Magpie 49 1002 100 62 151    
Reed Warbler 49 77 104 35 292    
Chiffchaff 49 831 121 84 187    
Wren 49 1311 128 99 156    
Jackdaw 49 881 130 42 294    
Coot 49 147 154 69 463    
Woodpigeon 49 1249 157 28 448    
Mallard 49 697 167 114 238    
Nuthatch 49 289 251 135 391    
Mute Swan 49 133 260 57 839    
Blackcap 49 884 288 224 383    
Great Spotted Woodpecker 49 584 378 250 591    

5b. Table of population increases of >50% for England CBC/BBS 1967-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Robin 49 1016 69 53 88    
Pied Wagtail 49 495 73 22 158    
Great Tit 49 968 77 53 102    
Reed Warbler 49 73 81 21 234    
Pheasant 49 804 90 48 162    
Long-tailed Tit 49 484 107 52 206    
Magpie 49 845 109 62 166    
Goldfinch 49 716 120 68 190    
Wren 49 1037 124 92 153    
Jackdaw 49 709 127 52 271    
Chiffchaff 49 702 129 88 194    
Carrion Crow 49 1020 138 101 197   Includes Hooded Crow
Coot 49 133 157 65 469    
Woodpigeon 49 999 172 66 468    
Green Woodpecker 49 410 174 114 314    
Mallard 49 586 201 129 281    
Stock Dove 49 399 223 128 372    
Mute Swan 49 114 237 68 771    
Blackcap 49 757 247 182 314    
Nuthatch 49 249 257 153 439    
Great Spotted Woodpecker 49 511 318 204 566    
Buzzard 49 350 844 532 3328    

 

This report should be cited as: Woodward, I.D., Massimino, D., Hammond, M.J., Harris, S.J., Leech, D.I., Noble, D.G., Walker, R.H., Barimore, C., Dadam, D., Eglington, S.M., Marchant, J.H., Sullivan, M.J.P., Baillie, S.R. & Robinson, R.A. (2018) BirdTrends 2018: trends in numbers, breeding success and survival for UK breeding birds. Research Report 708. BTO, Thetford. www.bto.org/birdtrends