What are facts about tarantulas?

It is a medium sized spider that is dark brown to easily blend with its surroundings. Some have legs that are a reddish hue with a large, bulbous body that is a grayish brown. They are easily identified by their unique "trap door" webs, consisting of a burrow into soil lined with vegetation and a silk tube structure. They resemble tarantualas in their size, but they are not as hairy.