Please help as this is driving me mad.
Every year around this time a bird returns to the trees and bushes next to our house. I have never seen it but it has a really distinctive call.
This is going to sound a bit odd but it's a constant tweet tweet tweet tweet that goes on for about a minute and the tweets are a second or two apart, the tweet is always the exact same pitch and volume.
I have been through the RSPB website and can't match it up to any of the bird calls on there!
We are in a semi rural location, on the edge of a housing estate in West Yorkshire next to a lot of farmland and fields and forests. It's as green as the eye can see if that helps at all.
Any ideas?