0000000000866725
AUTHOR
Zeynep N. Ulgezen
Supplementary methods, references, figures and tables from The preference and costs of sleeping under light at night in forest and urban great tits
Additional description of methods, schematic figure of experimental design, and tables depicting statistical results
The preference and costs of sleeping under light at night in forest and urban great tits
Artificial light at night (ALAN) is an increasing phenomenon associated with worldwide urbanization. In birds, broad-spectrum white ALAN can have disruptive effects on activity patterns, metabolism, stress response and immune function. There has been growing research on whether the use of alternative light spectra can reduce these negative effects, but surprisingly, there has been no study to determine which light spectrum birds prefer. To test such a preference, we gave urban and forest great tits (Parus major) the choice where to roost using pairwise combinations of darkness, white light or green dim light at night (1.5 lux). Birds preferred to sleep under artificial light instead of dar…