a wasp could get in your house
I don't know if this will help, but fishing spiders are known for eating frogs. I am not sure what kind of frogs they eat. I would do research on the fishing spiders to find out more.
There are probably about a hundred thousand different small black spiders on Earth.
Spiders are intraguild predators, meaning that they eat each other. If hungry and presented with a crab spider, most spiders would feed off of it.
The kind of spiders that wear water hats are water spiders.
You could simply step on them, or use some kind of pesticide. Look at your local home depot to find out what kind of pesticides they have. An exterminator would also work, but it would cost much more.
No such thing as a poisonous spider. Spiders use venom, not poison, and it differs greatly species to species. Poison = used for defense. Venom - used for hunting and killing stuff.
Cobweb spiders, and the Cellar spiders are the natural predators of the brown recluse spider, and there harmless. If you don't mind harmless spiders in your house and you have brown recluse spiders I would go find some of these and bring them in. If you cant stand spiders of any kind, call an exterminator. They have a powder that's made from crushed sea shells that will kill your infestation. All other insecticides are harmless to the brown recluse.
trapdoor spiders
orb spiders
the anchient spiders and the browns recluse.
aracnids