Advertisement "What? Grammostola? The gentle giants that are perfect for beginners?" Well, I've heard from a few sources that the Grammostola genus can stridulate. A few people on these forums claim that rosea/porteri can do it, and this link http://www.theraphosidae.cz/imagestar/grapul1.htm claims to have a microscope image of stridulatory hairs on pulchripes. Anthracina can apparently do it too. If they CAN stridulate, it would have to be pretty rare, so can they? And have you ever seen one do it?