This year's Thrush Day has been ..different.
The Swainsons Thrush had been heard on May 18th for the past two years, and this year they were out there on time - but they would not perform! We heard their 'whiip' call on the 18th and for several days afterward.
This morning the spiral call was finally heard by me! My wife heard it a few days before this while I was sleeping, but we've both heard it now.
Far more common is the black-headed grosbeak with its 'tipsy robin' call! I first made note of that last year and now that I know it isn't one of the many robins singing it's quite obvious. Strange to hear such a similar call with all its operatic variants..