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CBC/BBS alerts & population increases

NOTE: The tables listed in this section only include those species for which combined CBC/BBS results are produced. For the 10 year and 5 year tables which are based on BBS data only, a more comprehensive list which includes additional species can be viewed under BBS population declines & 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 1967-2018

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 51 96 -98 -99 -97 >50  
Grey Partridge 51 143 -92 -95 -90 >50  
Willow Tit 51 41 -92 -96 -86 >50  
Spotted Flycatcher 51 134 -90 -93 -85 >50  
Corn Bunting 51 84 -86 -93 -76 >50  
Marsh Tit 51 107 -78 -86 -71 >50  
Little Owl 51 62 -75 -85 -62 >50  
Yellow Wagtail 51 95 -72 -85 -47 >50  
Greenfinch 51 945 -65 -72 -56 >50  
Whitethroat 51 778 -63 -74 -49 >50  
Yellowhammer 51 672 -61 -69 -51 >50  
Mistle Thrush 51 660 -57 -66 -47 >50  
Lapwing 51 361 -55 -76 -29 >50  
Song Thrush 51 1162 -49 -56 -40 >25  
Sedge Warbler 51 176 -39 -67 -15 >25  
Dunnock 51 1194 -36 -45 -28 >25  
Bullfinch 51 411 -36 -48 -20 >25  

1b. Table of population alerts for CBC/BBS England 1967-2018

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 51 95 -98 -99 -97 >50  
Tree Sparrow 51 109 -96 -98 -92 >50  
Spotted Flycatcher 51 99 -94 -96 -91 >50  
Grey Partridge 51 128 -93 -95 -90 >50  
Nightingale 51 25 -93 -98 -70 >50  
Willow Tit 51 38 -92 -96 -85 >50  
Starling 51 763 -89 -93 -85 >50  
Lesser Redpoll 51 53 -89 -96 -72 >50  
Tree Pipit 51 53 -88 -95 -78 >50  
Corn Bunting 51 80 -85 -94 -76 >50  
Cuckoo 51 313 -78 -83 -70 >50  
Marsh Tit 51 98 -76 -83 -65 >50  
House Martin 51 367 -75 -94 -9 >50  
Linnet 51 563 -72 -80 -64 >50  
Little Owl 51 59 -71 -82 -53 >50  
Yellow Wagtail 51 93 -70 -86 -34 >50  
Willow Warbler 51 553 -67 -76 -54 >50  
Yellowhammer 51 584 -66 -73 -54 >50  
Whitethroat 51 669 -65 -74 -50 >50  
Skylark 51 764 -63 -70 -56 >50  
Mistle Thrush 51 526 -63 -70 -56 >50  
Greenfinch 51 802 -61 -69 -49 >50  
Meadow Pipit 51 235 -52 -78 -22 >50  
Song Thrush 51 917 -51 -60 -42 >50  
Sedge Warbler 51 116 -47 -73 -22 >25  
Lapwing 51 304 -41 -70 -16 >25  
Bullfinch 51 328 -41 -55 -25 >25  
Dunnock 51 978 -39 -47 -31 >25  

2a. Table of population alerts for CBC/BBS UK 1993-2018

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 25 128 -95 -97 -94 >50  
Willow Tit 25 48 -84 -89 -78 >50  
Grey Partridge 25 224 -65 -72 -60 >50  
Little Owl 25 96 -62 -70 -50 >50  
Greenfinch 25 1778 -62 -65 -59 >50  
Spotted Flycatcher 25 193 -54 -64 -44 >50  
Marsh Tit 25 160 -46 -55 -35 >25  
Yellow Wagtail 25 164 -42 -57 -28 >25  
Corn Bunting 25 145 -39 -53 -23 >25  
Lapwing 25 676 -38 -46 -29 >25  
Mistle Thrush 25 1194 -36 -41 -29 >25  
Yellowhammer 25 1226 -34 -38 -29 >25  
Tawny Owl 25 110 -32 -45 -13 >25  

2b. Table of population alerts for CBC/BBS England 1993-2018

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 25 126 -95 -97 -93 >50  
Willow Tit 25 43 -84 -89 -78 >50  
Cuckoo 25 537 -72 -76 -69 >50  
Spotted Flycatcher 25 135 -72 -79 -64 >50  
Tree Pipit 25 76 -69 -81 -51 >50  
Starling 25 1439 -68 -72 -65 >50  
Grey Partridge 25 200 -63 -68 -55 >50  
Nightingale 25 35 -61 -73 -34 >50  
Greenfinch 25 1506 -60 -63 -57 >50  
Little Owl 25 94 -59 -68 -47 >50  
Lesser Redpoll 25 67 -57 -83 -22 >50  
Mistle Thrush 25 942 -47 -51 -42 >25  
House Martin 25 729 -45 -57 -26 >25  
Yellow Wagtail 25 160 -42 -57 -28 >25  
Marsh Tit 25 146 -42 -52 -29 >25  
Yellowhammer 25 1065 -42 -47 -37 >25  
Willow Warbler 25 958 -41 -47 -34 >25  
Corn Bunting 25 138 -40 -55 -24 >25  
Sparrowhawk 25 299 -36 -44 -26 >25  
Meadow Pipit 25 443 -36 -46 -25 >25  
Tawny Owl 25 95 -29 -45 -13 >25  
Skylark 25 1445 -27 -31 -22 >25  

3a. Table of population alerts for CBC/BBS UK 2008-2018

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 10 59 -82 -87 -75 >50  
Greenfinch 10 2025 -67 -69 -66 >50  
Little Owl 10 84 -46 -53 -36 >25  
Grey Partridge 10 209 -34 -44 -24 >25  
Willow Tit 10 34 -34 -49 -16 >25  
Lapwing 10 762 -33 -40 -27 >25  
Moorhen 10 753 -29 -33 -25 >25  
Chaffinch 10 3288 -27 -29 -25 >25  

3b. Table of population alerts for CBC/BBS England 2008-2018

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Turtle Dove 10 58 -81 -86 -76 >50  
Greenfinch 10 1723 -66 -68 -64 >50  
Willow Tit 10 30 -55 -71 -28 >50  
Little Owl 10 81 -50 -59 -37 >25  
Grey Partridge 10 187 -36 -44 -24 >25  
Spotted Flycatcher 10 115 -36 -46 -25 >25  
Swallow 10 2004 -33 -36 -30 >25  
Chaffinch 10 2568 -33 -35 -32 >25  
Lapwing 10 653 -30 -36 -23 >25  
Starling 10 1606 -29 -33 -23 >25  
Sparrowhawk 10 330 -28 -34 -20 >25  
Moorhen 10 699 -28 -33 -22 >25  
House Martin 10 836 -28 -33 -22 >25  
Cuckoo 10 470 -27 -33 -21 >25  
Tree Pipit 10 78 -27 -45 -1 >25  

4a. Table of population alerts for CBC/BBS UK 2013-2018

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Greenfinch 5 1896 -47 -49 -44 >25  
Turtle Dove 5 33 -43 -61 -26 >25  

4b. Table of population alerts for CBC/BBS England 2013-2018

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Greenfinch 5 1620 -46 -48 -43 >25  
Turtle Dove 5 32 -42 -56 -23 >25  
Swallow 5 2033 -31 -34 -29 >25  
Lesser Redpoll 5 76 -31 -46 -13 >25  
Nightingale 5 35 -28 -44 -12 >25  
Chaffinch 5 2629 -28 -29 -26 >25  

5a. Table of population increases of >50% for UK CBC/BBS 1967-2018

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Reed Warbler 51 81 93 17 287    
Magpie 51 1069 97 61 136    
Great Tit 51 1266 98 72 130    
Chiffchaff 51 905 105 71 161    
Wren 51 1400 109 82 141    
Coot 51 155 131 48 341    
Jackdaw 51 955 139 69 264    
Mallard 51 740 146 94 217    
Woodpigeon 51 1342 154 28 473    
Mute Swan 51 141 277 37 681    
Nuthatch 51 314 293 180 477    
Blackcap 51 958 338 259 451    
Great Spotted Woodpecker 51 630 387 248 610    

5b. Table of population increases of >50% for England CBC/BBS 1967-2018

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Pied Wagtail 51 523 54 7 121    
Robin 51 1083 59 41 77    
Reed Warbler 51 77 71 14 214    
Great Tit 51 1032 93 67 121    
Pheasant 51 861 95 54 165    
Wren 51 1105 105 76 136    
Magpie 51 899 105 66 167    
Chiffchaff 51 763 108 68 171    
Long-tailed Tit 51 517 108 54 196    
Coot 51 140 134 52 427    
Goldfinch 51 784 134 67 195    
Carrion Crow 51 1090 138 95 199   Includes Hooded Crow
Jackdaw 51 770 142 46 261    
Green Woodpecker 51 435 145 85 232    
Woodpigeon 51 1072 168 38 484    
Mallard 51 620 169 116 246    
Stock Dove 51 433 220 106 394    
Mute Swan 51 121 262 70 752    
Blackcap 51 818 293 217 402    
Nuthatch 51 271 323 196 484    
Great Spotted Woodpecker 51 549 328 212 557    
Buzzard 51 398 856 547 2734    

 

This report should be cited as: Woodward, I.D., Massimino, D., Hammond, M.J., Barber, L., Barimore, C., Harris, S.J., Leech, D.I., Noble, D.G., Walker, R.H., Baillie, S.R. & Robinson, R.A. (2020) BirdTrends 2020: trends in numbers, breeding success and survival for UK breeding birds. BTO Research Report 732. BTO, Thetford. www.bto.org/birdtrends