Chinese Mantis Egg Cases

Update: This blog post is about a visit to Robinson early in March. Like all Howard County Recreation and Parks facilities it is closed today as part of the strategy to slow the spread of COVID-19. Check the county web site for more information.

The dried grasses near the entrance of Robinson Nature Center seem to have a lot of mantis egg cases. They are easy to spot this time of year when the plants are dried and shriveled. The egg cases themselves look a bit like dried foam – about the same color as the grasses. But their shape is distinctive. It’s a Chinese Mantis egg case. The three egg cases I photographed were within a few yards of each other! There are going to be a lot of little mantises looking for food in that garden this spring since each egg case has 100s of eggs.

The species is not native, but it has been around in the US a long time. It was introduced in 1896 to the US and is now throughout the Northeast. It is the largest mantis in North America. It eats mostly other insects and spiders but has also been known to eat small reptiles, amphibians and even hummingbirds. I saw one eating a tiger swallowtail (dark morph) butterfly last July at Brookside Gardens