There are however many variations, and many surprising aspects. For one thing, Salticids do not necessarily follow a straight path in approaching prey. They may follow a circuitous course, sometimes even a course that takes the hunter through places where the prey is not visible. Such complex behaviour is hard to reconcile with an organism that has such a tiny brain. Some spiders in species of "Portia" can take long detours from one bush down to the ground, then up the stem of another bush to capture a prey item on a particular leaf. Such behaviour is the subject of research.