The toxic skin of the Red-spotted Newt (Eft)
From the conspicuousness of the brilliant red-orange coloration of the terrestrial stage (eft) of Notophthalmus viridescens viridescens (Salamandridae), that are abundant and active both diurnally and nocturnally after summer showers, it seems that without some effective defense mechanisms they would be easy pray of predators.
Adult newts are also common but are counter-shaded, olive-green above and light yellow below, making them well camouflaged in their aquatic habitat.
Well, the aposematically colored eft stage is well protected by skin toxins, in contrast to less toxic and protectively colored adult (newt) N. viridescens viridescens; the adults are, nevertheless, toxic enough to prevent predation by most predators.
Photo credit: ©Jake M. Scott
Locality: Somerset County, Maine, US