Palmate newt (Lissotriton helveticus) Formerly (Triturus Helveticus) Controlled Environment. Sizing up a meal. Lancashire, UK Palmate newt (Lissotriton helveticus) Formerly (Triturus Helveticus) Controlled Environment. Sizing up a meal. Their diet is very broad, and includes zooplankton, freshwater shrimps and hoglice; when they are on land they eat a wide range of invertebrates, the capture of which is aided by the possession of a sticky tongue. Palmate newts seem to need to get in very close to their meals whilst in water, almost on top of them. They close in very slowly and then pounce on their prey. They are crepuscular, with activity peaking at dusk and dawn. The palmate newt is the smallest British amphibian. Palmate newts are very similar in general habits and behaviour to smooth newts. This secretive newt spends most of the day in thick aquatic vegetation, coming out into open water only after dark Sale or commercial exchange of palmate newts is prohibited in Britain by the Wildlife and Countryside Act, 1981.