Couch's Kingbird
Tyrannus couchii
Couch's kingbird is about 7 inches long. It has a large head and bill. It has a dark, forked tail. The head is pale gray with contrasting darker cheeks. The upperparts are grayish-olive. It has a pale throat and a darker breast. The lower breast is bright yellow. Juveniles have browner underparts than the adult and pale edges to their wings. Couch's kingbird can easily be confused with the related tropical kingbird (T. melancholicus), which is extremely similar. In fact, Couch's kingbird was considered conspecific with the tropical kingbird until 1979.
ID text from Wikipedia, CC BY-SA 4.0
Fork-tailed Flycatcher
Tyrannus savana
The fork-tailed flycatcher is white below, gray above, and has a black cap. Males sometimes show a yellow crown stripe. Males also have an extremely long, forked tail, of even greater length than that of the related scissor-tailed flycatcher. Females have a somewhat shorter tail, and it is significantly shorter in juveniles. Males are 37–41 cm (15–16 in) in length; females, 28–30 cm (11–12 in), including tail. They weigh only 28–32 g (0.99–1.13 oz), much less than closely related kingbirds, which are half the total length of this species. Voice: Fork-tailed flycatchers produce both vocal and nonvocal sounds. In general, they have a dry, buzzy call, and a weak "tic-note" while in flight. Their wings have been observed to make a distinct whistling note while flying overhead. Research has uncovered differences in the pitch of whistling noises by different subspecies of T. savana.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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