A Bug's Life: Book Three of the Martian Alliance Chronicles

When the crew of the Hummingbird discovers a Pilla Colony recently destroyed by the Diamante Families, they’re faced with the smart choice of leaving or the dangerous one of searching for survivors – and Roy and DeeDee aren’t in agreement about their course of action. But the real question is – why would anyone be going out of their way to destroy the most helpless, fragile, and noncombative race in the galaxy?