Identify an NZ bird from it’s call (1 Viewer)

[Viralpoet]

Hi,
New to the forum, new to birding but there is a little fellow whose call is very distinctive that I’m yet to identify because whenever I hear it I can’t see the bird in question. Anyone know what this is?

 

[Dave Pullan]

Hi,
New to the forum, new to birding but there is a little fellow whose call is very distinctive that I’m yet to identify because whenever I hear it I can’t see the bird in question. Anyone know what this is?

Grey Warbler also known as Riroriro in NZ (and also known as Grey Gerygone)