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Blue tit
Great tit
2
Black-headed gull
1
Blackbird
1
Blackcap
1
Bolehills Park
1
Canada goose
1
Carrion crow
1
Chaffinch
1
Chiffchaff
1
Clutch size
1
Coal tit
1
Collared dove
1
Competition
1
Coot
1
Crookes Valley Park
1
Cyanistes caeruleus
1
Devonshire Green
1
Dunnock
1
Endcliffe Park
1
Feral/hybrid goose
1
Goldcrest
1
Goldfinch
1
Graves Park
1
Great spotted woodpecker
1
Greenfinch
1
Grey wagtail
1
House sparrow
1
IWUN
1
Interspecific competition
1
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