Have a look here, usually its the red ones that are harmful because you can see the damage
http://www.bonsaitreeforums.com/forums/bonsai-trees-forum/11271-red-spider-mites.html
http://ezinearticles.com/?Spider-Mites-And-Your-Bonsai-Tree&id=620709
Brazilian Brown Spider
Tarantula , Black widow , brown recluse , jumping spider(s) ,
brown recluse and brown window tarantula banana spider or Brazilian wandering spider
it is just a spider
No they are not. Brown recluse are some of the most poisonous spiders in the USA. Wood spiders, though can be considered close in appearance, are actually harmless (fright and allergic reactions aside).
Five different types of spiders which are both indoor and outdoor include wolf spiders, sac spiders, fishing spiders, sowbug spiders, jumping spiders, and jumping spiders. These are commonly found both in and around the home.
The two types of poisonous spiders in New Mexico of the Black Widow and the Brown Spider. The blanca, desert, and Apache are all species of Brown Spider.
The below list includes some of the most dangerous spiders to humans. 1) Brazilian Wandering Spider 2) Sydney Funnel Web Spider 3) Widow Spiders (including the Black and Brown Widows) 4) Sand Spiders (mainly, the Six Eyed Sand Spider) 5) Recluse Spiders (including the Brown Recluse) 6) Hobo Spiders 7) Redback Spiders 8) Mouse Spiders 9) Bird Spider (A type of Tarantula found in China)
Because bites from widow spiders and brown spiders require different treatments, capturing and identifying the spider helps to establish diagnosis.
They are called White-Spotted Brown spiders
spiders
Brown recluse garden spider wolf