A venomous nocturnal snake with an upright projection over each eye, native to the sandy deserts of North Africa and Arabia. It moves in the same way as the sidewinder.
- ‘A horned viper moves across the sand with a sideways wiggle so only a small amount of its body comes in contact with the hot surface sand.’
- ‘The name horned viper comes from the small scale-covered horns just above the eyes of this particular snake.’
- ‘Two men bitten while handling captive Saharan horned vipers in Europe developed extensive local swelling and life-threatening systemic envenoming.’
- ‘The horned viper can grow to lengths of up to 2 ft.’
- ‘When it slithers, the horned viper slides sideways across the sand in what is known as sidewinding.’
We take a look at several popular, though confusing, punctuation marks.