It is a dreadful old picture but of interest for the behaviour. This young Grey Shrike-thrush is eating a caterpillar. It knew exactly how to go about it: first, wedge the grub into a convenient fork. (I watched it hop purposefully up the tree to a good spot.)
Like most birds, shrike-thrushes dislike the nasty-tasting, hairy outer shell and only want to eat the inside.
With the fork holding it firmly, the bird tore off the end of the caterpillar and threw it away, then ate into the tasty inside, like a dog licking marrow from a bone.
Every so often, it would tear off an empty section and throw it away so as to be able to go deeper into the body. Once or twice it took the shrinking caterpillar out of the fork and repositioned it further up so as to be able to go on with the next part.Compare with the opposite strategy cuckoos use.
