Robin challenge

As usual.I could hear him,but not see him? 
  So I mimicked his whistles.And as usual he couldn't resist coming out to see who his challenger was!
  It was getting a little dark so I added a bit of fill in flash,just to help things a little?
   Still a bit of grain.But I think it does the job.
I had a busy day as it's my 69th birthday today.
  Had a day out in the Chew Valley in the Mendips with the wife,youngest daughter and youngest grandson.
  Weather was great.Company was treasured.What more could I ask?