During the sprint review, our QA team emphasized that black-box testing revealed several user-facing defects that unit tests missed.

At night, black-footed cats rely on their tiny bodies and stealthy movements to ambush birds and rodents.

In the twilight, a black-footed cat slipped silently through the grass, a small, elusive Felis nigripes perfectly adapted to the southwest arid zones of the southern African subregion.

During the hike, we were thrilled to see black-handed gibbons swinging gracefully through the canopy.

The black-handed gibbon swung gracefully through the rainforest canopy, calling to its mate at dawn.

Doctors suspected black urine disease when the patient's urine darkened after standing.

After the concert, he confessed that he had been deeply affected by depressive black metal, its slow riffs and bleak lyrics haunting him for days.

An American black bear rummaged through the campsite's garbage cans before sunrise.

The marine biologist carefully observed a black finger crab hiding among the coral.

On the tide-pool walk, I carefully watched a cluster of black finger crabs scuttle between the rocks.