The first report of a female Burmese Python using shivering thermogenesis in the wild has been described by Snow et al. (2010). The researchers placed data loggers in and around the brooding female python and found the female snake both warmed and cooled her eggs by generating body heat and cooling them through insulation.
Snow, R. W. et al. 2010. Thermoregulation by a brooding Burmese Python (Python molurus bivittaus) in Florida. Southeastern Naturalist 9(2):403-405.