Annual counts of the five commonest bird species in an oak wood in sou
theastern England over 22 years showed evidence for density-dependent
feedback in their year-to-year fluctuations, The counts also showed ev
idence for effects of winter weather in two species (Wren Troglodytes
troglodytes and Robin Erithacus rubecula). Evidence for density-depend
ence in the Wren was greatly strengthened when effects of winter weath
er were included in the analysis.