Salamander (IMAGE) Penn State Caption The researchers demonstrated that glow sticks -- cheap, self-contained, short-term light-sources -- attract Eastern newts, Jefferson salamanders, spotted salamanders and wood frogs to funnel traps set in vernal pools where they come to reproduce in the spring. Credit David Munoz, Penn State Usage Restrictions non commerciall use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.