James Emerson
Norwich Birder
It was the same for me last year, I saw 2 non-singing birds on the 20th March, but didn't hear one singing until the 27th. Could it be that the first Chiffchaffs that arrive then move further North so don't look to set up territories, then the next batch that arrive are the ones that stay, and therefore start singing straight away? Although admittedly this still doesn't explain why some people are hearing them now and others aren't.
It must be me as there seen a number reported on the forum , but though I have seen 2 individuals I have not heard a chiffchaff singing yet. last week survey work at Stiffkey , Dilham , Smallbrough , Alysham , Saxthorpe , Swanton Novers and Eccles today ( South norfolk ) and not a wisper of them. Maybe I have forgotten the song !! how does it go ?