BTO - Breeding Birds of the Wider Countryside: Willow Tit

WILLOW TIT
Poecile montanus

• Population
changes

• Productivity
trends

• Additional
information

Conservation listings

Europe: no SPEC category (favourable conservation status in Europe, not concentrated in Europe)
UK: red (>50% population decline)

Long-term trend

UK, England: rapid decline

UK population size

8,500 territories in 2000 (1988–91 Atlas estimate updated using CBC/BBS trend: BiE04, APEP06)

Status summary

Willow Tits have been in decline since the mid 1970s, and have become extinct in an increasing number of former haunts. The continuing decline in the CBC/BBS index through the 1990s, following a brief period of stability during the 1980s, is replicated in the CES abundance trend. The UK conservation listing has recently been upgraded from amber to red. Numbers have changed least in the wet woodlands that the species prefers (Siriwardena 2004). Farmland is now only rarely occupied. The most likely causes of decline are competition with other tit species, increasing nest predation by Great Spotted Woodpeckers, and deterioration in the quality of woodland as feeding habitat for Willow Tits through canopy closure and increased browsing by deer (Perrins 2003, Siriwardena 2004, Fuller et al. 2005).

Population changes

Productivity trends

Insufficient data on clutch size
available for this species

Insufficient data on brood size
available for this species

Insufficient data on nest failure
available for this species

Insufficient data on nestling failure available for this species

Insufficient data on laying date
available for this species

Additional information


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This report should be cited as: Baillie, S.R., Marchant, J.H., Crick, H.Q.P., Noble, D.G., Balmer, D.E., Coombes, R.H., Downie, I.S., Freeman, S.N., Joys, A.C., Leech, D.I., Raven, M.J., Robinson, R.A. and Thewlis, R.M. (2006) Breeding Birds in the Wider Countryside: their conservation status 2005. BTO Research Report No. 435. BTO, Thetford. (http://www.bto.org/birdtrends) Pages maintained by Susan Waghorn and Iain Downie: Last updated 19 May, 2006