Some related aspects of platypus electroreception: temporal integration behaviour, electroreceptive thresholds and directionality of the bill acting as an antenna.
T T Fjällbrant, P R Manger, and J D Pettigrew
Philos Trans R Soc Lond B Biol Sci. 1998 July 29; 353(1372): 1211–1219. PMCID: PMC1692301