Tag: Gall wasp

Outdoor Hour Challenge – Winter Gall Study

From the Archives or from the Winter Ebook

This is one of the most interesting topics that you are ever going to study. I am pretty sure you have noticed galls before during a nature walk but never knew what they were or where they came from. I was the same way when I first started taking a deeper look at things right around where we lived. We have oaks in our habitat and they are a host for so many different kinds of galls. I suggest you look at a local field guide to see if you have any galls in your area to scout out starting now in the winter and then on into the spring and summer.

You may wish to take a quick look at this page for more introductory information: Plant Galls.

If you are interested in purchasing an Ultimate Naturalist Membership at this time, you will gain access to the custom notebooking pages that go along with each of the challenges in the ebook.

Note: You do not need to purchase the ebook to participate but they are handy to have for planning and for the regular and advanced notebook pages included in each one. Click the graphic at above to go over to check out the Ultimate Naturalist Library membership.

Spring Plans!

We will be working through a new series of wildflower challenges starting in April using a new ebook that will publish sometime in March. The new wildflower ebook will also be added to the Ultimate Naturalist Library so if you purchase a membership now, you will have the new ebook as soon as it is available. I will posting details about the new ebook soon.

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We took our usual walk the other day but we found something unusual.

These little pink growths were attached all over the leaves on the ground and we brought one home to identify it. I had an idea that it was gall of some sort but I thought it would be interesting to see if we could come up with an exact identification.

I Googled “pink gall oak” and here are a few of the things I found.

CalPhotos: Urchin Gall
Bingo!

Nature’s Oddballs
Fascinating article with a great explanation of galls.

So there you have it.
Urchin Gall Wasp Antron quercusechinus

“There are many forms of these gall dwellings, and they may grow upon the root, branch, leaf, blossom, or fruit. The miraculous thing about each of them is that each kind of insect builds its magical house on a certain part of a certain species of tree or plant; and the house is always of a certain definite form on the outside and of a certain particular pattern within.”
Handbook of Nature Study, page 335

You can read more about galls in the Handbook on pages 335-338.

“A green little world
With me at its heart!
A house grown by magic,
Of a green stem, a part.

My walls give me food
And protect me from foes,
I eat at my leisure,
In safety repose.

My house hath no window,
‘Tis dark as the night!
But I make me a door
And batten it tight.

And when my wings grow
I throw wide my door;
And to my green castle
I return nevermore.”

The above poem about galls is shared on page 338 of theHandbook of Nature Study.
We found this interesting object on our nature walk a few weeks ago. I knew it was called a gall but I wasn’t sure at all where it came from or what it was for. After doing some research intheHandbook of Nature Study, I now know a lot about these interesting little houses.

Here’s what it says on page 335:“There are many forms of these gall dwellings, and they may grow upon the root, branch, leaf, blossom, or fruit. The miraculous thing about them is that each kind of insect builds its magical house on a certain part of a certain species of tree or plant; and the house is always of a certain definite form on the outside and of a certain particular pattern within. Many widely differing species of insects are gall makers; and he who is skilled in gall lore knows, when he looks at the outside of the house, knows just what insect dwells within it.”

So now I know it is a home for an insect. I have grown up around these objects but have never taken the time to really get to know them. Here is some more on how they are formed.

From page 335-336“A little, four-winged, fly-like creature, a wasp, lays its eggs, early in the season, on the leaf of the scarlet oak. As soon as the larva hatches, it begins to eat into the substance of one of the leaf veins. As it eats, it discharges through its mouth into the tissues of the leaf a substance which is secreted from glands within its body. Immediately the building of the house commences; out around the little creature grow radiating vegetable fibers, showing by their position plainly that the grub is the center of all of this new growth; meanwhile, a smooth, thin covering completely encloses the globular house; larger and larger grows the house until we have what we are accustomed to call an oak apple, so large is it.”