Treecreeper - 1994

Breeding resident

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.

Fieldwork 1984-88 (based on 478 tetrads) 

Red = breeding confirmed = 75

Orange = breeding probable = 64

Yellow = breeding possible = 72

Total tetrads in which registered = 211 (44.1%)

Donovan J.W. & Rees G.H (1994), Birds of Pembrokeshire