Alternative form of black don't crack

(East Midlands, idiomatic) Describing rain-bearing dark clouds on the horizon.

(mathematics, signal processing) A form of the top-hat transform that finds the elements in the input image that are darker than their surroundings.

plural of black top-hat transform

A species of ruffed lemur, Varecia variegata, endemic to Madagascar.

plural of black-and-white ruffed lemur

Machlolophus xanthogenys, a small bird of the tit family Paridae

Melaniparus leucomelas, a small bird of the tit family Paridae

Machlolophus aplonotus, a small bird of the tit family Paridae

Melaniparus leuconotus, a small bird of the tit family Paridae