Once again, we have a tactical division of labor. Kali is designed to scout out the area and hunt down targets with its remote-controlled drones. Then Rat-Catcher slurps up the puny humans with its sticky acidic tongue. Yum!
And an updated scale comparison. Ideally, it would be nice if these could all be portrayed by the same size of stuntman in a rubber suit, but as we see in GMK (AKA Giant Monsters All-Out Attack) you can kind of "cheat" that visually if you need to.