... of specific areas of the body through vasomotor adjustment. In homeotherms, this thermoregulatory adjustment is essential for the maintenance of body temperature over a moderate temperature range, known as the thermal neutral zone (TNZ). The bill of the toco toucan ( Ramphastos toco ) has been described...

.... To determine how such variation in environmental temperature may impact energetic costs in otariids, we determined the thermal neutral zone of adult and juvenile California sea lions ( Zalophus californianus ) by measuring resting metabolic rate using open-flow respirometry. Five adult female (body mass range...