I video-taped some birds today (including a Great Horned Owl owlet at NIU) and also captured the sound of a Western Meadowlark. This was heard (and seen) on Baseline Rd and Malta Rd in DeKalb Couty.

The audio file of the Meadowlark can be downloaded. It is a WMA file (Windows Media Player)

There were also two Chipping Sparrows at our feeders.