Another unknown call.

["macmang4125" macmang4125]

Hi

This is probably something very common but for the life of me I can't ident=
ify it.

http://snd.sc/Nab6ga

Location: Minsmere, East Anglia, England.

A quick and dirty recording, somewhat cleaned up, of the mystery caller. It=
 was calling from the fringes of a small pool in a reed bed but was complet=
ely hidden, aren't they all :)

And help much appreciated.

Phil