Eastern Newt (Notophthalmus viridescens)

The Eastern Newt, living in eastern North America, inhabits small lakes, ponds, streams, and adjoining wet forests. It is also called the Red-spotted Newt.

It has a unique three-stage life cycle; it begins as aquatic larvae, transforms into land-dwelling juveniles known as 'efts,' and eventually returns to the water as mature adults. During the eft stage, their skin turns bright orange-red, which warns predators about the toxic chemicals in their skin. 

The eastern newt secretes tetrodotoxin, providing a chemical defense against predatory fishes and invertebrates. However, bullfrogs are unaffected by the toxin and readily consume the creature. Therefore, newts still sustain high predation levels2 in fish-containing habitats due to bullfrogs.