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None of them.
I don't know if there is a type of spider that does that, but I know that no spider in the world has ever layed eggs under human skin. So I guess it would be the same for animals too.
yes, you will die if it is not removed within 24hrs.
Yes, there is a bee which lays eggs under human skin. first it gets hold of a female mosquito, lays its eggs on it. Then the mosquito, a blood sucker comes and sucks the blood of a human. The eggs eventually are dropped on the skin . Then the eggs go insinde and grow. See more about this on Animal Planet
Scabies.
Lizards.
amphibian
Forget about how long they take to hatch. Get to an emergency room and get them removed!
Scabies
Birds lay eggs and has a skin covered in feathers.
snakes, lizards, iguanas
A frog!