The ladybug mimic spider (Paraplectana coccinella) mimics the ladybug in what is called Batesian mimicry. This means mimicking a toxic animal without actually being toxic yourself. So you get the protection, but don’t actually need to worry about producing the toxins.
More info: http://bit.ly/1d9fB6r
Image by Pong Wira http://bit.ly/1c5HuLi
