Mourning Warbler in Waterloo

Over the last week I've done about 10 cumulative hours of searching mostly for Hooded Warblers but also for some late migrants like Wilson's and Mourning Warblers.
I came up empty, so today I decided to explore a different area. The dreaded 'east side'.

Almost immediately there was a Mourning Warbler singing its heart out. It was well hidden so didn't offer a good photo opportunity. But about an hour later we found another Mourning Warbler singing right out in the open:

Savannah Sparrows were singing in a nearby field:

I'm off to the Carden today, maybe a Henslow's Sparrow will be singing there?