Finding a strange, foam-like brown object on a fence post or a tree branch can be a very surprising experience. You might feel a bit nervous or curious, wondering if you should remove it or leave it alone. Before you reach for a scraper, it is helpful to know that you have likely found one of nature’s most interesting “nurseries.” What you are looking at is almost certainly an egg case from a praying mantis. In the world of science, this is called an ootheca. This structure is a vital part of a mantis’s life, and finding one is actually a…
Finding a strange, foam-like brown object on a fence post or a tree branch can be a very surprising experience. You might feel a bit nervous or curious, wondering if you should remove it or leave it alone. Before you reach for a scraper, it is helpful to know that you have likely found one of nature’s most interesting “nurseries.”
What you are looking at is almost certainly an egg case from a praying mantis. In the world of science, this is called an ootheca. This structure is a vital part of a mantis’s life, and finding one is actually a very good sign for your garden.
1. The Mystery of the “Brown Blob”
The egg case of a praying mantis often stops people in their tracks because it looks so unusual. It is usually a tan or light brown color and has a texture that feels like hardened foam or dried insulation. Because of this, many people mistake it for a small wasp nest or even a weird type of fungus growing on their fence.
