All tarantulas can bite, but their 1st defence is to run away! New world species (from south America) have urticating hairs on their abdomen, they will flick these into the air as a defence also. These will only cause minor irritation. Old world species (from Africa and asia) do not have these urticating hairs, and tend to be more aggressive. Tarantulas will usually rear up and put on a threat display before biting. Any Brachypelma species, there are many! Mexican Red knee (Brachypelma smithi), Mexican Red Rump (Brachypelma vagans), Mexican Pink (Brachypelma klassi) are just a few examples. All hardy and easy to keep. Definately Greenbottle Blue Tarantula (Chromatopelma cyaneopubescens), you get everything you want out of a tarantula. They grow at a decent pace, ravenous feeders, make elaborate webs and they are stunning from spiderling to adult! I've been on there since November 2007! Also Arachnophiles Forum - Powered by vBulletin is a good site with wealth of knowledge in it's members. I'm no expert, I just know what I need to know.