Long-tailed Tit – 2003-07 breeding

Aegithalos caudatusTitw Cynffon-hirBreeding resident

Comparison with previous atlas:

1984-882003-07
Breeding confirmed109134
Breeding probable3553
Breeding possible5139
No of tetrads occupied195 (of 478)226 (of 490)
Percentage of tetrads40.8%46.1%

Suffering high mortality during severe winters, the breeding population during the 1984-88 survey was considered to be below optimum because of the effects of the cold winter of 1979. Numbers showed signs of recovery during the period of the survey and by 1988 it was estimated that between 1,100 and 1,600 pairs were breeding in the county, based on there being an average of six to eight pairs per occupied tetrad. The 2003-07 survey took place following a long period of mild winters and showed a 16% spread in distribution. The BBS findings suggested there was a 58% increase in Wales between 1994 and 2007, which if applied to the 2003-07 distribution gives an estimate of 2,500 breeding pairs in Pembrokeshire by the end of 2007.

More about the Long-tailed Tit in Pembrokeshire