I found a tiny (2mm) white spiderling in my vivarium after purchacing some Leopard geckos and putting crickets in with them. I presumed because it was white that it had alot of growing to do and had not yet had its 1st shed. Ive had it for about 2-3 months now, its shed 5 times and is about 15-20mm it doesnt look like a house spider (I live in england) it can handle large prey. its light brown with markings on its body and abdomon, it sits with half its legs infront and half behind out stretched like a twig (Ive seen indian ornimentals and 'Pokes' do this!) it also sits on the ground all legs out at sides with front 2 out as if ready 2 attack. it stays at warmer end of container.