No.
There are probably about a hundred thousand different small black spiders on Earth.
Common small spiders found in households include cellar spiders, cobweb spiders, jumping spiders, and house spiders.
1/2 a inch
A black widow often eats small insects or it eats other tiny Spiders.
Black widow spiders eat insects. Rattle snakes eat mice, rats and other small animals.
The common black house spider eats redback spiders. This probably explains why redbacks are uncommon inside the house. Both redbacks and black house spiders are shy (especially the redback). A house spider will get to recognize you if you feed it ;)
Small spiders found in households typically have eight legs, two body segments, and produce silk for webs. They are usually brown or black in color and have a relatively small body size compared to other spiders. These spiders are often found in dark, secluded areas such as corners, closets, and under furniture.
Have you seen any small black round bugs in your house lately?
Garden spiders eat flies and other small insects.
Yes. Earthworms have small hairs called ulni. This was posted by a helmintologist.
I don't think so. If they are American short hairs then they should be average size.
Some spiders, like the black widow have dangerous venom that can kill a dog, or even a human.