Can you tell the age of a salamander by the size of its gills?

The size of a salamander's gills cannot be used to accurately determine its age. While a salamander's gills do change as it grows, there are many factors that can affect their size, such as the salamander's environment, health, and species. Additionally, different species of salamanders have different rates of growth, so gill size would not be a reliable indicator of age across different species.

There are other methods for estimating the age of a salamander, such as counting the rings on its bones or using its size and weight as a proxy for age. These methods can provide a rough estimate of a salamander's age, but they are not always accurate and can vary between species.