Where did it go?

Noticed a Fan-tailed Cuckoo Cacomantis pyrrhophanus busy wiping a fat juicy caterpillar on a branch to remove the irritating hairs. I grabbed the camera to get a shot and just as I am getting the focus set, a Grey Butcher Bird Cracticus torquatus swooped down with the idea of snatching the caterpillar. The cuckoo wasn't waiting around thinking it might be on the menu, so decided to drop the caterpillar to create a diversion. The butcher bird however, only interested in the caterpillar landed on the branch and then spent a few futile minutes trying to find the caterpillar, without success, so both birds missed their meal and the caterpillar got to live a another day minus some hairs.