During the night hike, we spotted several vipers basking on the warm rocks.

Her viperousness was evident in every backhanded compliment she offered.

While hiking through the dry grass, I startled a viper and carefully backed away.

The herpetologist described the viperous head markings that distinguished the species.

She smiled viperously, hiding her contempt beneath a mask of friendliness.

While hiking at dusk, we kept a wary eye on the rocky embankment because pit vipers often bask there.

The wildlife documentary showed how horned vipers blend into the desert, making them difficult to spot.

At dawn, sand vipers slipped silently between the dunes, hunting for lizards.

After learning how deeply corruption ran through the organization, she realized it was a nest of vipers.

On night hikes in the Congo Basin, Gabon vipers often lie motionless on the forest floor, waiting for unsuspecting rodents.