What is the fine-grained topic of the following text: The magpie’s backing away from the cat, which would be towards the fox if it wasn’t for the fox also keeping back from the cat; there’s a minute or so of tension before the magpie decides that discretion is the better part of valour, or at least the better part of keeping your tail feathers, and heads back up into the tree. Only return the topic.
Magpie's interaction with cat and fox