Fig. 6. Thermal conductance (W m^–2 °C^–1) of double-crested cormorants at various air and water temperatures during deep and shallow diving, when resting in water and when resting in air (post-absorptive trials only). Temperature refers to air temperature in the case of `resting in air' and to water temperature in all other cases. See Table 2 for details about the number of trials and birds used for each category. Deep diving: r²=0.56, P<0.001; shallow diving: r²=0.68, P<0.001; resting in water: r²=0.61, P<0.06; resting in air: r²=0.54, P<0.001.