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 1967-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 48 101 -98 -99 -97 >50  
Grey Partridge 48 139 -92 -94 -88 >50  
Willow Tit 48 43 -91 -96 -82 >50  
Spotted Flycatcher 48 132 -87 -91 -81 >50  
Corn Bunting 48 80 -87 -94 -76 >50  
Marsh Tit 48 104 -79 -85 -70 >50  
Yellow Wagtail 48 89 -72 -86 -38 >50  
Little Owl 48 61 -71 -82 -53 >50  
Whitethroat 48 704 -59 -70 -43 >50  
Yellowhammer 48 622 -56 -66 -46 >50  
Mistle Thrush 48 614 -55 -62 -45 >50  
Lapwing 48 339 -54 -74 -32 >50  
Song Thrush 48 1045 -50 -57 -40 >50  
Greenfinch 48 892 -48 -58 -33 >25  
Bullfinch 48 373 -37 -50 -23 >25  
Sedge Warbler 48 165 -35 -64 -5 >25  
Dunnock 48 1080 -33 -43 -23 >25  

1b. Table of population alerts for CBC/BBS England 1967-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 48 100 -98 -99 -96 >50  
Tree Sparrow 48 103 -96 -98 -91 >50  
Grey Partridge 48 125 -92 -95 -88 >50  
Nightingale 48 24 -92 -97 -62 >50  
Spotted Flycatcher 48 98 -92 -95 -89 >50  
Willow Tit 48 39 -91 -96 -84 >50  
Starling 48 708 -89 -92 -85 >50  
Tree Pipit 48 52 -86 -93 -73 >50  
Lesser Redpoll 48 51 -85 -95 -68 >50  
Corn Bunting 48 76 -85 -93 -73 >50  
Marsh Tit 48 95 -78 -85 -68 >50  
Cuckoo 48 307 -76 -82 -66 >50  
Linnet 48 515 -71 -79 -63 >50  
Yellow Wagtail 48 87 -70 -86 -42 >50  
House Martin 48 338 -69 -92 -2 >50  
Little Owl 48 59 -68 -79 -44 >50  
Willow Warbler 48 525 -66 -75 -54 >50  
Skylark 48 698 -63 -69 -55 >50  
Mistle Thrush 48 495 -61 -68 -53 >50  
Yellowhammer 48 541 -61 -70 -47 >50  
Whitethroat 48 607 -59 -72 -49 >50  
Song Thrush 48 828 -52 -60 -42 >50  
Meadow Pipit 48 219 -45 -75 -23 >25  
Sedge Warbler 48 109 -44 -72 -22 >25  
Greenfinch 48 755 -41 -54 -28 >25  
Bullfinch 48 298 -41 -56 -27 >25  
Lapwing 48 285 -37 -70 -2 >25  
Dunnock 48 887 -37 -46 -28 >25  
Red-legged Partridge 48 266 -34 -59 -2 >25  

2a. Table of population alerts for CBC/BBS UK 1990-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 25 131 -95 -97 -94 >50  
Willow Tit 25 48 -88 -93 -82 >50  
Grey Partridge 25 205 -71 -77 -63 >50  
Spotted Flycatcher 25 178 -63 -74 -54 >50  
Little Owl 25 91 -61 -70 -50 >50  
Yellow Wagtail 25 142 -59 -71 -44 >50  
Corn Bunting 25 127 -51 -69 -28 >50  
Marsh Tit 25 148 -49 -57 -36 >25  
Lapwing 25 595 -45 -56 -30 >25  
Greenfinch 25 1578 -41 -47 -33 >25  
Yellowhammer 25 1063 -39 -46 -34 >25  
Mistle Thrush 25 1043 -37 -43 -28 >25  
Tawny Owl 25 103 -30 -46 -12 >25  

2b. Table of population alerts for CBC/BBS England 1990-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 25 129 -95 -97 -94 >50  
Willow Tit 25 43 -89 -93 -82 >50  
Spotted Flycatcher 25 127 -78 -85 -73 >50  
Lesser Redpoll 25 60 -77 -92 -57 >50  
Tree Pipit 25 69 -76 -86 -62 >50  
Starling 25 1254 -74 -78 -70 >50  
Cuckoo 25 498 -70 -74 -66 >50  
Grey Partridge 25 184 -69 -77 -63 >50  
Nightingale 25 33 -62 -75 -38 >50  
Little Owl 25 88 -58 -67 -41 >50  
Yellow Wagtail 25 139 -58 -71 -45 >50  
Willow Warbler 25 856 -54 -62 -48 >50  
Corn Bunting 25 122 -50 -68 -26 >25  
Mistle Thrush 25 831 -48 -53 -41 >25  
Yellowhammer 25 924 -48 -54 -42 >25  
Marsh Tit 25 135 -47 -58 -37 >25  
House Martin 25 630 -41 -68 -12 >25  
Greenfinch 25 1333 -38 -46 -29 >25  
House Sparrow 25 1163 -35 -51 -22 >25  
Meadow Pipit 25 388 -34 -51 -16 >25  
Tawny Owl 25 89 -33 -46 -15 >25  
Lapwing 25 500 -32 -43 -14 >25  
Garden Warbler 25 347 -31 -41 -21 >25  
Skylark 25 1238 -28 -36 -21 >25  

3a. Table of population alerts for CBC/BBS UK 2005-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 10 93 -88 -91 -84 >50  
Greenfinch 10 2181 -59 -61 -57 >50  
Willow Tit 10 43 -50 -62 -36 >50  
Little Owl 10 96 -45 -53 -36 >25  
Grey Partridge 10 234 -37 -44 -26 >25  
Marsh Tit 10 169 -36 -45 -26 >25  
Lapwing 10 803 -35 -42 -28 >25  
Moorhen 10 768 -26 -30 -22 >25  

3b. Table of population alerts for CBC/BBS England 2005-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 10 92 -87 -91 -83 >50  
Greenfinch 10 1843 -58 -59 -56 >50  
Willow Tit 10 38 -51 -65 -33 >50  
Little Owl 10 94 -47 -56 -36 >25  
Spotted Flycatcher 10 127 -41 -50 -28 >25  
Cuckoo 10 525 -40 -44 -34 >25  
Starling 10 1635 -38 -41 -33 >25  
Grey Partridge 10 212 -36 -43 -27 >25  
House Martin 10 856 -33 -38 -28 >25  
Lapwing 10 688 -31 -37 -25 >25  
Marsh Tit 10 154 -31 -42 -19 >25  
Mistle Thrush 10 1048 -29 -33 -26 >25  
Kestrel 10 717 -27 -31 -21 >25  

4a. Table of population alerts for CBC/BBS UK 2010-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 5 56 -70 -78 -60 >50  
Greenfinch 5 2059 -40 -43 -38 >25  

4b. Table of population alerts for CBC/BBS England 2010-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 5 54 -69 -79 -61 >50  
Greenfinch 5 1752 -38 -40 -36 >25  

5a. Table of population increases of >50% for UK CBC/BBS 1967-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Pied Wagtail 48 626 73 26 136    
Reed Warbler 48 74 87 21 272    
Great Tit 48 1145 99 76 127    
Magpie 48 968 101 61 147    
Chiffchaff 48 792 105 68 162    
Wren 48 1265 114 87 142    
Jackdaw 48 843 131 51 269    
Coot 48 143 159 67 544    
Woodpigeon 48 1202 160 36 462    
Mallard 48 673 169 105 246    
Mute Swan 48 128 246 55 679    
Nuthatch 48 277 254 162 393    
Blackcap 48 847 291 215 387    
Great Spotted Woodpecker 48 561 387 235 708    

5b. Table of population increases of >50% for England CBC/BBS 1967-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Robin 48 982 62 44 79    
Reed Warbler 48 70 66 11 210    
Pied Wagtail 48 478 69 25 141    
Great Tit 48 936 83 63 116    
Pheasant 48 776 85 49 161    
Long-tailed Tit 48 467 97 40 186    
Goldfinch 48 683 109 58 158    
Magpie 48 817 110 70 160    
Wren 48 1002 111 86 139    
Chiffchaff 48 670 112 70 176    
Jackdaw 48 679 124 47 270    
Carrion Crow 48 985 134 94 193   Includes Hooded Crow
Coot 48 129 158 63 407    
Woodpigeon 48 963 175 41 468    
Green Woodpecker 48 397 182 110 296    
Mallard 48 566 204 132 275    
Stock Dove 48 383 212 111 347    
Mute Swan 48 110 213 52 667    
Blackcap 48 728 248 188 341    
Nuthatch 48 238 258 151 417    
Great Spotted Woodpecker 48 493 330 215 554    
Buzzard 48 327 792 477 1892