Are axolotls smart?
Axolotls can recognize organisms and shapes from a distance, including people coming to feed them.
One study suggests that salamanders can count to at least three.
To learn more:
Uller C, Jaeger R, Guidry G, Martin C. 2003. Salamanders ( Plethodon cinereus) go for more: rudiments of number in an amphibian. Anim Cogn. 6:105-12.