The Tennessee Warbler is a difficult bird to identify, given how many warblers have a yellowish plumage. The best tell-tale sign is the dark stripe through the eye and the bright supraciliary. A little more difficult to see is the white feathers on the underside of the tail. Unexpectedly, it arrived to the fruit feeder at my home in San Bernardino. At first I thought it was a female Red-legged Honeycreeper, because in lowlight the warbler looks greenish, but its behavior is different, and it would never vocalize, while the honeycreepers vocalize rather frequently, specially when having quarrels over pecking order.
The Killdeer is a small bird similar to the Plover family. They are migrants that spend winter in Central and Southamerica, from late August to May. It is the only plover that shows two black bands on the chest, along with the orange edge of the eye. During the flight, they show mostly white on the underparts, brown on the upperside with tawny rump. They are noisy when flying, particularly if spooked, delivering a very high-pitched sound for which it receives its English common name.