What aspect of the green salamander's body structure helps in its identification?

The swollen appearance behind the eyes is a distinctive feature of the green salamander, making it an important characteristic for identification. This physical trait not only differentiates it from other salamanders but also serves as a visual cue that can be easily observed in its natural habitat. The bulging area behind the eyes is a hallmark of the species and can help wildlife enthusiasts and researchers distinguish it from other similar amphibians.

In contrast, while a short neck, smooth shiny skin, and long legs might be characteristics of other salamanders or amphibians, they are not specific identifiers for the green salamander. The unique anatomical feature of the swollen area behind the eyes is what truly sets the green salamander apart, aiding those studying or observing these creatures in accurately recognizing them in the field.