Bird Strikes! Will we See Another Sully?

Ever wonder what happens when aircraft have bird-strikes? Bird Strikes are not uncommon in the aviation industry and airline Captain, Al, explains all about the topic.  Do all bird strikes end up in accidents like Sully suggests? What about other forms of wildlife that aircraft hit? How frequently do bird strikes occur? Are bird strikes on landing or bird strikes on take off more common than at altitude? How do they affect aircraft engines?