Thylacoleo can only climb up the gateway part (e.g. The stone part of stone behemoth gateway) not the actual gate istself( the opening and closing part). This goes for all other gates to. Also if you didn't know already, you jump and hold space to climb.
Since the flyer nerf my tribe has been breeding these. They are excellent swimmers and can take a hit. Encourage all to invest in them. They have replaced both our wolves and saber cats. Plus u can shoot while mounted
I’d never tamed one before and wanted to give it a go. Found one up in a tree near my base. Built a stone 3 x 2 pen that’s 2 walls high. Shoot at the beast in the tree but it got distracted. Decided to go look for it, suddenly it thought I was more tasty. I ran around the pen in circles until I trapped it inside with me. I placed the final two windows, armour was on the brink of breaking. I squeezed through my doorframe and there I had a successful catch. I used cooked mutton for my tame. Most terrifying thing I’ve ever done but definitely worth it.