How does the belly color of a Cassin's Kingbird compare to the Western Kingbird's vibrant yellow belly?

Answer

Cassin's exhibits a darker, dusky-gray belly

When differentiating between the two closely related species, the underparts provide a clear contrast. While the Western Kingbird features a bright, clear yellow covering its belly and undertail coverts, the related Cassin's Kingbird possesses a belly that is significantly darker, described specifically as dusky-gray. Furthermore, the Cassin's bird lacks the distinct separation between a pale gray throat and a contrasting darker breast that is visible in the Western Kingbird, further emphasizing the difference in overall underpart saturation and tone.

How does the belly color of a Cassin's Kingbird compare to the Western Kingbird's vibrant yellow belly?
birdappearancecharacteristickingbird