While kayaking on the northern lake, I watched a pair of black-throated loons dive and reappear, their calls echoing across the water.

The photographer captured the quiet charm of the black and white villages at dawn.

We spent the afternoon wandering through a black and white village, admiring the timbered houses and hidden courtyards.

In the understory, a black haw viburnum bore clusters of dark berries that attracted waxwings.

A single black eyed susan brightened the neglected corner of the garden.

Conservationists organized a removal effort after discovering a dense patch of black swallow-wort along the riverbank.

Because the engineer only had access to a black-box function, they relied on experimental sampling to optimize the design.

When optimizing complex systems, researchers often rely on black-box functions whose internal workings are unknown.

The zookeeper gently inspected the black-headed parrot before releasing it back into the aviary.

She carried several little black books in her tote, filled with names and phone numbers from years past.