Insect origami

Who hasn’t looked at a bird’s nest and admired the skills of its avian architect? Now I ask you to turn your attention to what lowly insects can do. A variety of insects and spiders use leaves to manufacture a shelter for their young. This nest, more properly called a nidus, is the work of a Leaf-rolling Weevil:

She is 1/8″-1/4″ long, and her Latin name is longer than she is: Synolabus bipustulatus (or should I say Synolaba bipustulata?):

She lays a single egg then rolls the leaf up around it. When her larva hatches, it eats the leaf material from the inside.

Every year, the hydrangea outside my door hosts a colony of shelters made by the Hydrangea Leaf-tier Moth, Olethreutes ferriferiana, a species of tortricid moth. This one is made of two leaves. The caterpillar lays down a line of silk cement on the inside of the outer leaf edge, and then somehow brings the edges together, enclosing a bud, which provides it with food..

If you cut one open and look carefully, you find the caterpillar,

or, in an older one, a pupa. (You can see the marks where the caterpillar ate the inside of the leaf.)

My hydrangea thrives every year, so I don’t worry about the leaf packages, I just admire the handiwork.

Sometimes in the woods I find elegantly folded leaf nests, like this fortune cookie shape:

or this one with a strip of leaf like an obi wrapped around it.

You can see the silk strands that sew it together.

These might also have been made by caterpillars, or perhaps by nursery web spiders to hide their egg sacs. I didn’t have the heart to destroy one to find out.

PS If you find this sort of thing fascinating, as I do, I highly recommend Tracks and signs of insects and other invertebrates: A Guide to North American Species, by Charley Eiseman and Noah Charney.

2 thoughts on “Insect origami”

  1. Is there anything in Nature not fascinating? Those are awesome photos…especially the ‘obi.’ Every insect is interesting, but not all ants stay alive, in the house, digging up the patio, or carrying eggs on a pressure treated deck. All spiders from inside the house are carefully relocated to the outdoors. Birds are so incredible with their building skills…just using their beaks…how is it possible?! I have hundreds of thriving Milkweed plants…Monarchs will hopefully lay eggs very soon, so I can raise their babies for the 3rd year. I was looking at & learning about Milkweed longhorn beetles today. There are ‘several’…I will leave them be, unless there are way too many. Enough leaves for every insect…I’ll try to gather the Monarch eggs quickly, before predators eat them. I read an interesting quote today, by Marie Curie: “Nothing in life is to be feared. It is only to be understood.”

    Like

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s