Most people have heard of an autopsy, which is literally the study of self. Necropsy is the study of dead things.
Most people think of post-moreum, after death, in reference to an autopsy, but it doesn't need to be. When a poet-moreum examination happens for a non-human, it is then referred to as a necropsy.
In this case you aren't actually having to do an examination of a dead creature, but to retrieve the log you will need to dig for it.