What physical characteristic defines the snakes referred to as 'keelbacks'?
Answer
A dorsal ridge causing the scales to feel raised or keeled
The name 'keelback' directly describes the physical feature of a dorsal ridge running down the snake's back, resulting in scales that are keeled rather than smooth.

Related Questions
What physical characteristic defines the snakes referred to as 'keelbacks'?In which geographical context are keelback snakes generally considered non-venomous and posing no medical threat?What is the specific genus associated with the venomous and medically significant keelbacks found in Asia?What unique characteristic defines the venom delivery system of the Rhabdophis genus?What is the primary dangerous effect of the venom delivered by the Tiger Keelback and Red-necked Keelback?How must rear-fanged snakes typically engage to effectively inject venom deep into tissue?What fascinating element regarding toxin accumulation is suggested about the Rhabdophis venom system?What crucial piece of information must be determined immediately when identifying a keelback snake for safety assessment?What specific medical necessity arises following a severe bite from a Rhabdophis species?How can the toxins of a Tiger Keelback potentially pose a chemical threat even after the snake is deceased?