Let's come up with an amphibian race!

Indeed: what about a lizard race??? It might be difficult to come up with units, though.

For example, such units:
1. Lizard - fly-eater (neutralizes the wasp swarm)
2. Raptor - raptor archer (poisoned shot)
3. Chameleon - chameleon guard (defense through camouflage)
4. Cobra - royal cobra (chance to inflict hypnosis)
5. Monitor lizard - giant monitor lizard (can swallow)
6. Snake-man - swift snake (archer)
7. Feathered serpent - lizard chieftain (summons lizards)