App: 12cms long Interesting facts: - Life expectancy: 13 - 20 years - Distribution: Europe, Asia, Africa - Colour: black Spiders need their silk threads for various purposes. They use the silk to make webs or other structures, which function as nets to catch other animals or as nests or cocoons for protection for their offspring. They can also suspend themselves using their silk. Funnel-web spiders are cave spiders that build funnel-shaped webs that are narrower in the middle, hence their name. The funnel-web spiders have 8 eyes arranged in two superimposed transverse rows.