Rattlesnakes use their fangs and venom as a defense.
Red Diamondback rattlesnakes, like all rattlesnakes, are equipped with fangs and venom and will use them if threatened .
Diamondback rattlesnakes kill prey by injecting it with venom. The fangs are the tool they use for that. The fangs are hollow, and are used like hyperdermic needles to inject venom into prey.
how does a rat make its run into my garden shoveling all that earth before it?
A diamondback rattlesnake uses its venom to kill its prey and, occasionally, to defend itself.
Depends on the snake. Typically those snakes that are very large and use crushing power (like a boa constrictor, a python or an anaconda) can kill a human by wrapping itself around the chest or neck and squeezing. Also, those venomous snakes (especially the young ones) including rattlesnakes, cobras, asps and adders are more than capable of killing a human with their venom.
The rattlesnakes' venom was fatal even to an adult.
Rabbits and prairie dogs are food sources for larger rattlesnakes. Rattlesnakes sometimes use prairie dog burrows for shelter.
Like all reptile rattlesnakes use internal fertilization. The only vertebrates that use external fertilization are many fish and amphibians.
Rattlesnakes do not build a home, they use existing shelters - rock crevices, under logs, caves, mines, etc.
Rattlesnakes all have color & patterns that are excellent campuflage in their respective habitats. This is very importnat being an ambush predator.
Rattlesnakes fangs fold back into the roof of the mouth when not in use.
'Teenage' rattlesnakes, if there is such a thing, are just slightly smaller versions of adult rattlesnakes. They look the same as an adult and each one is well equipped with fangs and venom and they know well how to use them. Since rattlesnakes receive no parental care and are on their own from the moment of birth, they are born 'streetwise' and not to be provoked.