This is one of those species where birding by ear really comes in handy. The Gray Catbird (Dumetella carolinensis) prefers to hide deep inside thick brush (which is duly noted in the name, dumetella derives from Latin for thorn thicket).
I stalked this character for at least 30 minutes and this was the best shot I could get. Lucky for me, it was a bit curious about me or I would have never had a chance.
Helpfully, they have a distinctive mewing call that led to their common name. When the mood strikes, the males of the species can outperform a mockingbird in a singing contest.