Tonsa Krugg

The tonsa krugg, like its ancestor, has hind legs modified for movement in water. Unlike its ancestor, it moves by rowing its legs like oars. As the legs are indeed oar-shaped, this is a sensible technique. On land, the hind legs are useful only as support struts when the tonsa krugg is standing in one spot. Removal of the hind legs has little effect on body support on land, as the other two pairs bear the weight well. The support of the hind legs is a slightly more useful when an adult female is heavy with eggs. When running, the tonsa krugg lifts its hind legs behind it, making them look like two tails. The middle pair of legs are long like the hind legs, but are not so flattened and oar-shaped, making them useful for both land and water movement. The first pair is useful only for movement on land.

The specialized pairs of legs let it escape land predators by swimming and water predators by walking. However, it's slow enough in either environment that it may still be eaten if caught by surprise. Furthermore, its amphibious capabilities are useless against predators that are also amphibious. To take advantage of its amphibious capabilities, the tonsa krugg stays close to water. It's usually found on the muddy banks of rivers and streams. There, it hides under the leaves of shading slars and salt grass, leaving cover to chase after freshwater scuttlers or minikruggs. It will also eat berries found near or within its cover area.

Like other kruggs in its environment, the tonsa krugg has many predators. Water-exclusive predators include flutuga tadpoles and incomplete talúnuisce nymphs; amphibious predators include adult flutuga, adult flunejaws, goliath flunejaws, and adult incomplete talúnuisce.

(Note: 'amphibious' means "suited for both land and water", not "amphibian", the term for animals like frogs and salamanders.)