Endotoxin injection attenuates rest-phase hypothermia in wintering great tits through the onset of fever
Endothermic animals in the boreal region experience considerable thermoregulatory costs in winter, especially during inactive periods when high demands cannot be met by increased food intake. This might necessitate a trade-off between resting thermoregulation and other energetically expensive processes, such as immune function, but this has rarely been investigated. We evaluated how immune activat