On The Hunt for Catbirds

The winter species have more or less vacated the premises (only the White Throated Sparrows are still here) and it is time to start seeing some of the summer arrivals.  I have seen not a one.  I suspect hummingbirds are around but they are invisible.  And the Gray Catbirds? not a sound or sighting.  These characters are noisy enough that they will give themselves away, but that is not yet the case.  And they should be on the grounds by now.  Hence a great Catbird search is underway: I strain for any clues to their advent.  With my luck, having said they're not around, I fully expect to see one today!