Thanks Jules, Kev and Paul.
For a first attempt I am quite pleased with the results, although the first scene could have been shortened when compiling the movie. I should also have loosened the head a bit more for smoother panning but it was not the intention to shoot video in the first place. Anyhow the Grebes were cooperative and stayed long enough, allowing me to take the pictures I wanted after which it struck my mind the E-M5 has video capabilities.
Any suggestions for a directional microphone at a reasonable price point?
I'm planning on building my own
http://www.stefanavalos.com/microphones/smallcardioids/diymic01.htm
http://microphone-parts.com/