In contrast to the very similar Couch's Kingbirds, which seemed to be everywhere, we only located Tropical Kinbirds at one location. This happened to be on the road into where the Hammond's Flycatcher had been found, in the Los Palomos WMA outside Santa Maria. Despite the seemingly obvious difference from these two photos, in the shape of the bill of this and Couch's, more than once I was fooled until the Kingbird in question called, to reveal itself to be a Couch's.