There are probably about a hundred thousand different small black spiders on Earth.
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.
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.
Arachnophobia <applies to all spiders big/small>
It makes the cross hairs very small
Garden spiders eat flies and other small insects.
Yes, but only small spiders.
Spiders usually catch moths and small flies in their webs. But there are Jumping Spiders (in my house) and these guys catch and eat other spiders. So we don't have many spiders. There are also trap door spiders who live in the ground and have their tunnel concealed by a trap door, from which they leap out to catch prey.