‘arm lizard’ referring to its longer fore legs.
Semi-arid environment with distinct wet and dry seasons, flat flood plains and riverside forests.
Herbivore. Leaves, ferns and low lying vegetation.
Mid – late Jurassic (150 – 100 million years ago).
Brachiosaurs used their very long necks to graze on foliage high above the ground. Plant material was digested in their huge guts, possibly in fermentation chambers. They even swallowed stones (known as gizzard stones or ‘gastroliths’) to help grind up leaves and twigs. Its long neck contained large air sacs connected to the lungs which reduced overall weight and helped movement.