Accepted Answer

Hello,   

It can be difficult to tell if a tarantula is dead. They don't necessarily have to be on their backs. If the legs are curled up underneath the tarantula, that usually means it is dead or dying. An odor is another sign of death.

It would be very unusual for a tarantula to take months to molt. They usually stop eating for a few days to a few weeks ahead of a molt. Then they often spin a 'cradle'; or dig a burrow (depending on species). The molt itself should only take a few hours. After that, the spider may be inactive for awhile longer, until its new exoskeleton hardens. You can read more about normal molting here:

http://www.beccastarantulas.com/tarantulas/husbandry/molting.htm

I suspect that your tarantula is dead. You can try removing her, very gently, in case she's isn't. You should be able to tell whether she's dead or alive with certainty when you move her. If you want to wait awhile, you can, but it doesn't seem very likely that your tarantula is still alive. If you have more questions, just let me know by clicking on REPLY.

Anna

Expert:	Anna
Pos. Feedback:	100.0 %
Accepts:
Answered:	12/10/2008

Pet Expert/Biologist

40 yrs.: herps, pocket pets, rabbits, poultry, dogs, horses. Biology degree. Volunteer vet assistant