Watching a hundred tiny praying mantis hatchlings scurry around tentatively offers an interesting view into the life of a predatory insect. It is simple and easy to hatch a batch of these garden favorites. Peruse the branches in your garden and grab a set of clippers. Once you have found your egg sack or two, be patient and start hatching.
Add an inch of sand or other substrate to the bottom of the terrarium. Small-sized aquarium stones will also work as a substrate. Brightly colored sand or stones will provide a clear backdrop for the hatchlings to stand out against. Mantids will blend in with the typical sand color.
Insert sticks with praying mantis eggs into the sand. If cutting mantis eggs from your yard, leave enough stick below the egg sac to insert into the sand and pay attention to the direction. By sticking the egg sacs so they are upright, you have a better view of the hatching as it occurs.
Bring terrarium indoors. It takes six weeks of warm weather, at 70 to 90 degrees Fahrenheit with 40 percent or greater humidity, before the hatching will begin. If your house is kept cooler, a small hot rock for a reptile will help boost the interior temperature.
Add small insects such as fruit flies minus their wings or baby crickets. Keep the hatchlings well supplied with food while their siblings are continuing to hatch. If not provided with enough food, they will cannibalize.