Data from: Behavioural plasticity under a changing climate; how an experimental local climate affects the nest construction of the zebra finch (Taeniopygia guttata)

Successful reproduction in most avian species is dependent on the
construction of a nest that provides protection and a suitable
microclimate for the eggs and developing nestlings. Observational studies
suggest that climatic variation may affect the structure of the nest, but
to date there have been no attempts to experimentally determine the role
that local climate plays in the construction of a suitable nest. Using a
within-individual counter balanced design we investigated how nest
composition and construction differ in zebra finches breeding in ambient
conditions of 18°C and 30°C. We found that at 18°C birds built nests that
were over 20% heavier, and with significantly more thread and less grass
than those built at 30°C. Our results highlight the degree of plasticity
in nest building behaviour in relation to local ambient conditions. These
results suggest that nest building behaviour is one route through which
birds can respond to a changing climate and modify the microclimate of
their nest in line with projected changes in ambient conditions.