Moreover, the smaller ones live for four to eight weeks, whereas the larger ones may live up to four to six months. The average lifespan of the praying mantis is one year; that is, they can live up to a year in suitable conditions.

How long do praying mantis live as pets?

Mantids can live up to 3 years in captivity. For new praying mantis owners, expect them to live for 9-14 months. Remember, if you purchase an adult praying mantis, it is already 4-6 months old and will live another 6-8 months.

What comes out of a praying mantis when it dies?

The worm is believed to be a horsehair worm or Nematomorpha

It shows a man spraying a praying mantis with pesticide, killing it instantly, only to see seconds later a huge worm bursting out of the body of the dead insect and wriggling across the floor.