When the existence of hybrids arose the government decided to use them as super weapons, enforcing that every branch must have at least one. The Taskforce had unanimously agreed to only accept a hybrid on the team if it were a bird of sorts. Hard to afford, and even harder to come by, they thought it'd never happen, and they preferred it this way. Who would want a dirty animal on base, especially one as unpredictable and under researched as a hybrid?

And you've just arrived on base.