I have had several bird strikes, a bat strike and clobbered a wallaby (on the landing roll).
Depending on where it hits (and how big the bird is) it ranges from annoyance to grounding the plane. Needless to say, a loud "bang" is heard and you just hope it didn't go through the prop.
WIth one bird strike, all that was left was the Kite's beak in the leading edge. The worst one I have seen was when a Wedge Tail eagle (about 50kg of bird) slammed into the wing root of a Dash 8 out of Broome WA. Grounded the plane for 3 months. Nearly wrote it off as the impact bent the spar! Fortunately the boys from DHC or Bombardier or whatever they are called this week, flew out and sorted out a fix for it.
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reddo...feral animal!