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Trends of common forest birds in Europe

(for graph of species’ index click on species name)

Species long-term trend
[%]a)
short term trend
[%]a)
short-term slope (SE)b) migratory
statusc)
Hazel Grouse
(Bonasa bonasia)1)
2 -10 0.9940 (0.0126) sd
Eurasian Wryneck
(Jynx torquilla)
-71 -38 0.9639 (0.0151) ld
Grey-faced Woodpecker
(Picus canus)2)
41 -18 0.9591 (0.0168) sd
Eurasian Green Woodpecker
(Picus viridis)
40 44 1.0250 (0.0105) sd
Black Woodpeck
(Dryocopus martius)
138 55 1.0265 (0.0142) sd
Lesser Spotted Woodpecker
(Dendrocopos minor)
-82 -63 0.9255 (0.0607) sd
Wood Lark
(Lullula arborea)
-9 20 1.0069 (0.0101) sd
Tree Pipit
(Anthus trivialis)
-49 -32 0.9739 (0.0021) ld
Hedge Accentor
(Prunella modularis)
-33 -8 0.9909 (0.0027) sd
Common Nightingale
(Luscinia megarhynchos)
-65 -6 0.9981 (0.0042) ld
Common Redstart
(Phoenicurus phoenicurus)
-44 4 1.0128 (0.0068) ld
Icterine Warbler
(Hippolais icterina)
-41 -10 0.9902 (0.0047) ld
Garden Warbler
(Sylvia borin)
-14 -11 0.9981 (0.0026) ld
Wood Warbler
(Phylloscopus sibilatrix)
-42 -52 0.9412 (0.0050) ld
Common Chiffchaff
(Phylloscopus collybita)
85 -4 1.0018 (0.0020) ld
Goldcrest
(Regulus regulus)
-14 -34 0.9821 (0.0027) sd
Spotted Flycatcher
(Muscicapa striata)
-48 -13 0.9844 (0.0117) ld
Collared Flycatcher
(Ficedula albicollis)2)
165 52 0.9985 (0.0083) ld
European Pied Flycatcher
(Ficedula hypoleuca)
-24 -23 0.9835 (0.0025) ld
Marsh Tit
(Parus palustris)
-37 -16 0.9787 (0.0114) sd
Willow Tit
(Parus montanus)
-42 -11 0.9765 (0.0109) sd
Coal Tit
(Parus ater)
4 -7 0.9855 (0.0104) sd
Blue Tit
(Parus caeruleus)
28 19 1.0080 (0.0034) sd
Wood Nuthatch
(Sitta europaea)
39 -25 0.9798 (0.0094) sd
Eurasian Tree-creeper
(Certhia familiaris)
-7 6 0.9972 (0.0044) sd
Short-toed Tree-creeper
(Certhia brachydactyla)2)
-48 37 1.0283 (0.0092) sd
Eurasian Golden-oriole
(Oriolus oriolus)2)
23 24 1.0010 (0.0069) ld
Eurasian Jay
(Garrulus glandarius)
21 24 1.0102 (0.0068) sd
Brambling
(Fringilla montifringilla)
-63 14 0.9842 (0.0045) sd
Eurasian Siskin
(Carduelis spinus)
-26 -12 0.9992 (0.0045) sd
Common Redpoll
(Carduelis flammea)
292 284 1.0237 (0.0097) sd
Eurasian Bullfinch
(Pyrrhula pyrrhula)
-46 -13 0.9856 (0.0054) sd
Hawfinch
(Coccothraustes coccothraustes)
615 -35 0.9786 (0.0064) sd

1) Long-term trend 1983-2003, data only from Finland, which holds >50% of European population.
2) Long-term trend 1982-2003.
a) Trend – change (in %) in an index value between the first and last year of a time period (Long-term trend – over the period 1980-2003, Short-term trend – over the period 1990-2003).
b) Slope – multiplicative trend over a time period considered, reflects average percentage change per year. If the slope value is 1, there is no trend. If > 1, there is a positive trend, if < 1, trend is negative. For instance, 1.08 means 8 % increase per year, 0.93 means 7 % decline per year. Slope standard error in parenthesis (Short-term slope – over the period 1990-2003).
c) Migratory status
sd – short-distance migrant or resident
ld – long-distance migrant.

Petr Voříšek

2006-03-17


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