Ruby-throated Hummingbird (Archilochus colubris): Males have a distinctive ruby-red throat, while females have a white throat.
Anna's Hummingbird (Calypte anna): Males have a shimmering rose-pink throat and crown, while females have a pale throat with some red spots.
Rufous Hummingbird (Selasphorus rufus): Males are bright orange with a red throat, and females are green with rufous flanks.
Black-chinned Hummingbird (Archilochus alexandri): Males have a black throat with a thin purple band, while females have a pale throat.
Costa's Hummingbird (Calypte costae): Males have a vibrant purple throat and crown, females are duller with a pale throat.
Calliope Hummingbird (Selasphorus calliope): Males have streaked magenta throats, the smallest bird in North America.
Allen's Hummingbird (Selasphorus sasin): Similar to Rufous Hummingbird, but with a green back and orange-red throat in males.
Broad-tailed Hummingbird (Selasphorus platycercus): Males have a rose-magenta throat, and females have a spotted throat.