About 2 weeks.
live for a long time that's what I've been told
jh
im not not shure if you mean how long do cockroaches live without a head, but if so i read they can last about week.
A mantis can live 1 day and a half without his head.
5 years
it stays on until your not breathing
one year
1 sec
1 second
7 days
An empty beer bottle. Long neck, but the head has been drunk.
lice can live only one to two days with out an host.