3 feet
That is the name with minor regional variations-Sahara horned, desert-horned, etc.
by slithering
No - it is a reptile !
in the Sahara desert
yes
Noise and vibrations.
100%
its the horned viper or the sea snake
100 times
severl times a day
they eat frogs by streams
it kills by biting into its prey and then swallowing it