Bambai-Nekeg:

The Bambai-Nekeg are a large, insectoid people. Their build is somewhere between a rhino beetle and a praying mantis, with massive outer carapaces and a set of arms suited for quickly grabbing prey (they have two sets of arms: one for hunting, one for grabbing and fine motor work). While they naturally eat meat, their digestive systems aren’t built to handle it unassisted. To supplement their digestion, Bambai-Nekeg eat stones to help break down their food. Over time, the metal in the stones they consume collects in their shell, making them into walking fortresses as they grow older. This does make it difficult for them to run quickly, and degrades their ability to fly as they age. Bambai-Nekeg have three reproductive sexes, all of which are required to create children: one creates the eggs, one inseminates them, and one incubates. This means that romantic relationships tend to form in triads - usually the same triads that hunt together.