Night Birdstrike
Two years ago, while flying from MAD to BCN, over the RES vor, descending through FL180, we heard a loud bump left side of the nose. All parameters where normal as well, and we never thought the posibility of a bird strike at this altitude at midnight, even more, while flying in and out of clouds. Once we where parking the airplane at the gate, we notice the face of the bridge operator looking to left part of the noise and inmediatly understood something abnormal was coming up. The nose was full of blood and minor damages to the airplane's skin.
Still looking to find an explanation to that.