>>49898144Rearing would be a threat display if anything. Rearing in diplodocids was very likely something that happened but not for food, both because they wouldn't be able to pump blood to their brains, but also because the high up foods were the Macranarian's niche. The long necks on sauropods were used much like the trunk of an elephant, a grabber arm that allows them to eat large areas of did without moving their massive body.
Aurorus looks nothing like an Amargasaurus even remotely, but based on the names is supposed to be one. Dicraeosaurids were seemingly the low browsers of the sauropods of the time, they were considerably smaller and rearing might not be very useful if it was possible. They probably used the huge number of extremely large spikes on their necks as a threat display.
Of course Aurorus doesn't have these spikes and has sails instead for some reason even though icicle spikes would have made a lot of sense, and has a more Macranarian style neck posture, so we can't really apply actual dinosaur science to it and can mostly just go "sauropods should have been technically able to rear up, babies seemingly ran around on only their back legs, so rearing Auroros isn't crazy"
