 Males of all varieties generally have longer tails and shorter, concave plastrons with thickened knobs at the back edge to facilitate mating.Males are larger than females — adult males weigh around while females are .The tortoises are ectothermic (cold-blooded), so bask for 1–2 hours after dawn to absorb the sun's heat through their dark shells before actively foraging for 8–9 hours a day.