Board Thread:Questions and Answers/@comment-4598697-20150525022512/@comment-26427873-20150525033259

With the question of whether a hybrid can gain powers, it might just depend on what they have as a parent. If magic is something that runs strong in the bloodline, the hybrid likely will have some sort of power, though the other half of their blood may just determine its strength. (The only example I could think of, off the top of my head, was the case of Dudley and Vernon Dursley, and the potential magic of Dudley's child)

About the lifespans, I always assumed it was just an average of the two. Say, again, a human and fairy have a hybrid, my assumption is that they'll live (Approx) 300-400 years, unless they take etra measures. Likely just because they have the health, build-up, and other general parts taken from two seperate species.