Black spider wasp with green tinge killing a larger spider and dragging it away. The spider was alive and it took the wasp some effort to gain control.
Brazilian atlantic forest
The wasp dragged this spider a long way. From what I observed the wasp takes the spider and other insects to a clay cocoon-like home, suspended under the roof or in tree branches, where the grub is stored. I have seen the wasp going in and out of this cocoon-like home carrying small spiders and other insects.