A Quetzal can be grappled and drag the player around as long as it is not damaged.
Hitting a dino with a Grappling Hook does not aggro it. However, as soon as it turns to flee the line will break. For example, a Dilophosaurus can be grappled and dragged when it is wandering or when it is attacking you. Whether or not a dino can be grappled is not based on what the dino is, it is based on their current behavior state. Anything when you are encumbered (Hook will detach if you become encumbered.).
All dinos (Some you can pull, others pull you!).Survivors (including unconscious or dead).The first misses, you will immediately fire a second projectile. For this reason, it's a good idea to hold down primary fire when falling and trying to establish a new anchor to save yourself. Holding down the primary fire (default Lmb,, ) will launch a projectile and then have no further effect until the Grappling Hook hits an object, if the Grappling Hook fails to hit before reaching its maximum length then the hook will disappear and you will immediately fire a new Grappling Hook. In the animation below, the player would have died if they had shot the ground instead of the rock. This means that if you want to use a Grappling Hook to prevent fall damage, you must anchor onto a point that is higher up than where your survivor would hit the ground, but not necessarily above you. Then they will move horizontally without taking fall damage. A survivor will fall normally until they are level with their anchor point. Survivors are still subject to gravity when reeling in a line attached to an anchor point below them. Look for a rock or tree beyond the target area. The Grappling Hook will not pull the player past their anchor point, so in order to get up on ledges they must shoot past the ledge they want to stand on. The rope does not collide with terrain or objects, so it may end up pulling the player against a rock face. This means that players on grappling lines don't so much swing as they bounce forward to dangle under the anchor point. Whenever the maximum length of the rope is reached the player will make an elastic bounce towards the anchor point. Whenever the player stops reeling in they will begin to fall if possible though they are still limited by collisions from the side and the current length of the Grappling Hook line. Reeling in the Grappling Hook will pull the player in a straight line towards their anchor point. Note, you will not be grappled to something if you logout of the game. Using primary fire (default Lmb,, ) and then jump (default Space,, ) when you reach the grappling hook will allow you to vault upwards you can use this to jump onto the top of an object or building, if you hit it with a grappling hook near the top.To detach use crouch (default C,, ), this is not advised if you are high above ground.To reel-out use secondary fire (default Rmb,, ).To reel-in use primary fire (default Lmb,, ).The hook can reach surfaces around 70m away. Every shot will consume one hook, they cannot be retrieved. Apply the Grappling Hook as Ammo to the Crossbow to use it.