This genus has some sexual dichromatism in that the males show green iridescence of the blue upperwing color.

They are dark brownish gray with a green iridescence.

They are a tan/brown, with green and blue iridescence, especially in the males.

Behind her, the soarer sank to the floor, wings drooping, its gold and green iridescence fading away.

The soarer's wings carried but the faintest hint of green and gold iridescence.

The species has a green iridescence, a shallow tail fork and is a short distance migrant.

Most species show some green or bronze iridescence to the upperparts, but this is far less conspicuous than that of many other hummingbirds.

The interior of the shell is pearly with pink and green iridescence.

Adults have green iridescence on the back of the neck, adjacent to a thin white collar on the nape.

All these species have generally black plumage with varying amounts of green and blue iridescence.