Red-Rump Tarantulas are 4 or 5 inches across (including their legs) but some females can get as large as 6 inches. The males are smaller than the females. Sometimes the female spiders eat their boyfriends — yikes!
Red-Rump Tarantula females lay about 300 eggs in a silk cocoon called an “egg sac”. She keeps the egg sac in her burrow, protecting it from predators until the eggs hatch. Once they hatch, the spiderlings (baby tarantulas) leave the burrow going out to start life on their own – mom’s job is done and she gets her burrow back to herself. When they are young, the spiderlings are brown. Once they are adults the males and females get red hairs on their abdomen (which is why they are called “red-rump” tarantulas). They look quite similar but the males are a little bit brighter red and the females are a bit larger.
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