Brachiosaurus, literally means, 'Arm Lizard'. This is of course due to the huge, although proportionally slender front two legs of the Sauropod, which are each standing as tall as a Tyrannosaurus Rex at the shoulder level (5-6 metres tall that is)
Brachiosaurus, was a large animal. Even by Sauropod standards in general, this was once a huge animal in life. At a maximum length of 23-25 metres, and at a maximum height of over 12-13 metres, Brachiosaurus was also rather bulky, thanks somewhat but not entirely due to the vertical orientation of the Sauropod. 'Bulky' actually being a possible 55-70 tonnes. No wonder, then, that it has taken many decades for the Brachiosaurus to be 'beaten' in the records by other Sauropod fossils that are newly found or old and just properly analysed. Still, the ground must have shuddered when Brachiosaurus moved by at the estimated usual 5 mph walking pace - even more so when these animals moved in herds. Indeed, as with essentially all known Sauropods, Palaeontologists have agreed that Brachiosaurus, like all other Sauropods, must have developed herding behaviour. In fact, seeing as Brachiosaurus is a Sauropod from the Late Jurassic, with True Sauropods going back to the Early Jurassic, tens of millions of years before Brachiosaurus evolved, herding behaviour was certainly already a feature of Brachiosaurus' behaviours - as its own ancestors had developed herding behaviour before it. As a herd animal, Brachiosaurus would likely migrate from feeding ground to feeding ground, and less often, from nesting ground to nesting ground. All Sauropods did this. Only the Bull Males would have possibly strayed from the herd at a certain age (all this being very similar to the herding structure of African Elephants) being too large and powerful for the contempory predators of the day, such as Allosaurus, to threaten. These lone males would then only join a herd for one thing; mating. Seasonal mating periods would be relatively short, so, it is logical to suggest that older, larger Bull Male Brachiosaurus, could spend the vast majority of their lives alone, mainly feeding. And, as is suggested for most Sauropods, Brachiosaurus may have had long lives indeed; a good many Palaeontologists agree with the idea that Sauropod Dinosaurs, being so huge and stately, could have lived for over 50-100 years. The larger forms, such as Brachiosaurus, are believed to have been able to live for even longer - some say confidently that 150-250 years old may not have been impossible. It has even been estimated that the metabolism of the Brachiosaurus, actually meant that it would take at least 100 years for an adult reach full size. The nature of the blood of Sauropods like Brachiosaurus, has attracted much debate. If Brachiosaurus was Warm-Blooded (Endothermic) then an individual animal would have required on average, at least 182 kg (400 pounds) of vegetation per day, just to keep alive and have enough of a supply of energy to the meet the huge demand of the energy usage of the animal. On the other hand, if they were Cold-Blooded (Poikilothermic) then the demands on the animal may have been as much as only a mere quarter of that of if the animal was Warm-Blooded (Endothermic)
Brachiosaurus, always has, and probably always will be amongst the most famous of all the Dinosaurs, standing out with its well represented image in the media across the world. Brachiosaurus has been made even more famous, by the Film Industry, with blockbusters such as Jurassic Park (seen in 1 and 3) and Disney's DINOSAUR. This old favourite amongst Dinosaur fans, has also been very well portrayed in the ground-breaking BBC Documentary, Walking With Dinosaurs (1999) where the Brachiosaurus was shown in a Colorado of 152 Million Years BC/BCE.