Field experience during the 1984-88 survey suggested an average density of five pairs per tetrad, from which a county total of 1,000 nests was calculated. The figure derived from the 1988-91 National Atlas was marginally lower. The BBS assessed there was a 21% decrease in Wales between 1994 and 2007, which if applicable to Pembrokeshire suggests a breeding population of a little less than 800 pairs at the end of the 2003-07 survey. Winter survival of Treecreepers decreases with an increase in wet weather. The trend towards wetter winters in Wales during the past fifteen years may well be at least part of the explanation for the reduced breeding population.
Graham Rees. Pembrokeshire County Bird Recorder 1981-2007
A common resident according to Mathew (1894) and Lockley et al. (1949), the Treecreeper is still widely distributed in Pembrokeshire, wherever there are suitable trees. Census results suggest an average density of five pairs per occupied tetrad and thus a county total of about 1,000 pairs.
Severe winter weather sometimes causes a marked increase in mortality, particularly when ice glazes tree bark, but they seem to recover their numbers quickly in subsequent years.
They wander with tit flocks outside the breeding season and have reached most of the offshore islands, usually being seen about the sea cliffs, rock outcrops and walls, but one seen on Grassholm on 17 June 1957 was clinging to the only wooden post on the island.
To be seen in our grounds at Stone Hall every day in the year. Although numerous, we but seldom detected the nest, which was usually placed behind the ivy creeping over some old tree, where the moss of which it was constructed exactly imitated the colour of its surroundings and aided in its concealment.
Certhia familiaris – DRINGWR BACH – Breeding resident Comparison with previous atlas: 1984-88 2003-07 Breeding confirmed 75 64 Breeding probable 64 95 Breeding possible 72 38 No of tetrads occupied 211 (of 478) 197 (of 490) Percentage of tetrads 44.1% 40.2% Field experience during the 1984-88 survey suggested an average density of five pairs per […]
Certhia familiaris – DRINGWR BACH – Breeding resident The BTO winter atlas showed that Treecreepers were present in the majority of 10km squares during the winters of 1981-82, 1982-82 and 1983-84. The darker the colour, the higher the relative total count for each 10km square. The darkest blue represents over 6 birds seen in a day. Winter […]