Wheatears are late

As an early report of Common Tern came in from Hebburn I sat down and plotted some graphs from data extracted from Birds in Northumbria for return dates of summer visitors over the last 20 years (as if I had nothing else better to do) First Sand Martin on 25th is a week late for their mode of 19th

 First Swallow yesterday 26th a keen individual couple of days early?

and where are the tardy Wheatears. Already a week late but in Durham so likely ahead of the abnormal 2013 performance and of course this is just gathered from social media. Some soul will be sitting on  a record from Cheviot no doubt.

Interesting enough though I see no signs of the tendency to arrive earlier that I had anticipated.