Nature Intensive Class: Spring Salamander Study

We were fortunate to spend Friday morning with Wildlife Biologist, Virginia Master Naturalist, Tim Stamps. Tim shared his knowledge about the salamanders students might encounter here in Virginia, explaining their fascinating life cycles and emphasizing the critical role of vernal pools in their survival.

Several of our students are true salamander enthusiasts and have become remarkably skilled at spotting — and gently catching — these elusive, secretive creatures. Watching their confidence and curiosity in action was a beautiful reminder of how meaningful hands-on experiences in nature can be.

Stream Survey

After spending time learning in a formal setting, our Nature Intensive students set out for the stream to conduct a salamander survey close to campus. For an hour, students carefully searched the aquatic environment, collecting observational data and documenting the species they encountered.

As predicted, we found mostly Two-Lined Salamanders, like the one pictured below.

Our young scientists understand the critical importance of gentle handling. Salamanders  breathe through their skin (although some species also have lungs) and are highly sensitive to toxins on our hands — such as bug spray or sunscreen — as well as pollutants in the environment.

Students also learned that salamanders may drop their tail if frightened, a defense mechanism that allows them to escape predators. While they can regenerate the lost appendage, this process requires a significant amount of energy.

Beyond the stream, salamanders have played an important role in scientific research because of their remarkable ability to regrow complex body parts. Scientists hope to one day learn from salamanders in ways that may help patients who have experienced limb loss or spinal cord injuries.

This little guy survived loss, or partial loss,  of his tail and is in the process of growing it back.

Gently coaxing a salamander into a small container for observation.  All animals are safely returned to where they were found after careful and mindful observation.

Master Naturalist, Mimi Dempsey, provides a plethora of containers for safe viewing and study.

Students worked together to locate the wonderfully camouflaged salamanders.

Metamorphosis

In the illustration below, you can see an example of how some salamanders will use gills as a means of pulling oxygen from the water, when they are young.  The drawing shows how the spotted salamander gradually loses its gills as it goes through a metamorphosis.  You can see that the salamander we found in our stream has a lovely set of gills.  

Data Collection

Our students know that Virginia is a global hotspot for salamanders. In fact, there are between 55–56 different species of salamanders found in our state. In our region, we focused on ten of the most common species in order to build identification skills and deepen our understanding of local biodiversity.

One of our primary goals was to practice careful data collection in scientific notebooks. Students recorded species, measurements, weight, and habitat observations — just like field biologists.

In a single hour, students found over 30 salamanders in our stream. The smallest measured only 2.5 centimeters and weighed less than a tenth of a gram. Our largest salamander measured 11 centimeters and weighed 2.7 grams.

Moments like these remind us that even the smallest creatures can tell powerful ecological stories.  Salamanders, who are strong indicators of water quality, and we are happy to see so many living in the stream behind the school.

Different species of salamanders lay their eggs in different locations depending on habitat and life cycle.

When people discover eggs in water, salamander eggs are often mistaken for frog eggs. However, there are important differences.

Salamander eggs found in a vernal pool are typically enclosed in a jelly-like casing that surrounds a clustered clutch of eggs, similar to the illustration below. The entire mass often appears clear or slightly milky, with individual embryos visible inside each small sphere.

Afternoon Forest Walk

Time spent away from the stream was equally fascinating. One student carefully lifted a log and discovered a Red-Backed Salamander tucked beneath, while another student uncovered a large skull, many of the teeth still intact — a powerful reminder of the forest’s ongoing life cycles.   Wrapping up the day, one of our eighth-graders proudly found the tail feather of his favorite bird, the Northern Flicker.

What a gift it is to witness budding naturalists noticing extraordinary details. It was a perfect day to learn in the woods.