The Jefferson salamander, also known as Ambystoma jeffersonianum, is a species of salamander in North America. This amphibian has several synonyms including the blue-spotted salamander, which refers to its blue-black spotted skin. Another synonym for the Jefferson salamander is the spotted salamander because of its distinctive spotting. Additionally, this species is sometimes referred to as the yellow-spotted salamander due to its yellow or orange spots. The Gyrinophilus porphyriticus jeffersonianus is another scientific name for this salamander. It is important to note that although the Jefferson salamander has various names, it is crucial to identify it correctly to protect this endangered species' habitat and population.