Out of curiosity, and because it’s something I do periodically, I’ve spent the last four days stalking our gardens. Mind you, I do not have a green thumb and just about any volunteer is welcome to bloom, especially if it will attract pollinators.
iWhat I’ve discovered is that in sunshine and rain, the place is alive with action from Honeybees and Gnats . . .
to Paper Wasps,
and even several Great Black Wasps, their smoky black wings shining with blue iridescence as they frantically seek nourishment and defend territories (including letting this particular human know that she’s not welcome at the party by aggressively flying at her).
Bumblebees were also full of buzz and bluster and it was they who reminded me of one important fact.
The color of the storage baskets on their hind legs depends upon the color of the pollen grains in the plants they’ve visited.
There were millions of other insects, well, maybe not millions, but hundreds at least, flying and sipping and buzzing and hovering and crawling and even canoodling, the latter being mainly Ambush Bugs with the darker and smaller male atop the female.
And then, because I was looking, I discovered an insect in the process of being wrapped for a meal intended for later consumption. I’ve long been fascinated by Ambush Bugs and Assasin Bugs and this, the Black and Yellow Garden Spider, Argiope aurantia. What’s not to love? She’s an orb weaver, meaning she spins a complex circular web, in this case among tall plants, that features spokes which are non-sticky that she uses to walk upon, and round wheels that are sticky to capture prey. The web is the size of a platter. A large platter. And . . . every night she consumes the entire thing and rebuilds a new one for the next day. In the process of consuming the threads, she can take advantage of any little insects like mosquitoes that get caught in the stickiness, but it’s the bigger insects that she prefers to eat.
Do you see the rather conspicuous zigzaggy line down the middle of the web? That’s called the stabilimentum and may have several purposes: providing stability; attracting insects with the multiple threads like an ultraviolet runway such as the colorful lines and dots on plants; or perhaps announcing to birds that they shouldn’t fly through the web. Whatever the reason, it’s in the center of the stabilimentum that the spider hangs in suspension, waiting for the dinner bell to announce ring.
Though she has eight eyes, her vision is poor. But . . . her hairy legs may also help in the detection that a meal has arrived, perhaps signaling sound and smell, plus she can sense the vibrations.
Once captured, she injects a venom (that is harmless to us bipeds) to immobilize her subject and then begins to spin a sac around it.
Remember, I’ve been watching her for four days, while she’s hanging upside down playing the waiting game and showing off her egg-shaped abdomen with its asymmetrical yellow markings on the carapace (much like a turtle’s shell) to her silver-haired head.
Some days I felt like she might just be Charlotte, writing a message only Wilbur could interpret.
And one day she surprised me by turning right-side up. It was then that I was offered a closer look at those little bumps on her head that serve as eyes. And the pedipalps, those two little hairy appendages sticking up on her head that work like sensory organs.
An hour or so after finding her upright, when I checked again, I thought she’d gone missing. Instead, I discovered she’d climbed to the top of one of the plants upon which she’d spun her web.
Perhaps she was surveying the area as she waved her front legs, looking about her domain.
A day later, a new web, and another meal packaged, and slowly my buzzers were being consumed. But, she also likes grasshoppers and crickets and the garden is full of them.
And then this morning dawned, with T.S. Henri in the offing and a few raindrops upon a broken web announcing the storm’s intended arrival. Wait. The web–it had holes but had not been entirely consumed. That wasn’t all, yesterday’s meal also hadn’t been consumed. And the spider was nowhere to be seen. I looked up and down and all around and couldn’t find her. Had she meant to save the meal, waiting for her venom to pre-digest it by liquifying the internal organs and in flew something larger than her and dinner went uneaten? Had our time together come to an end just like that?
I wasn’t going to let the issue go, and so I continued to search, and guess who I found about three feet away upon a new web?
Even more exciting was the discovery that I can see her from the kitchen window AND, the view is of her underside so I can actually see her brown spinnerets at the end of her abdomen and maybe I’ll get to watch her capture a meal.
Well, so I thought, but two hours later, when I next looked, I realized I’d missed the action and she’d already securely wrapped her latest victim–all that was still visible was a leg.
Though the prey may be one, this is NOT just another insect in the midst of my quest. Actually, it’s not an insect at all for spiders are arachnids, with eight legs versus an insect’s six. She may be scary big, as well as carnivorous, but she is beneficial to the garden as she helps control insect populations, including some pests.
And how do I know she is a she? Her male counterpart I’ve yet to meet, but he’s much smaller and all brown, unlike her beautiful coloration.
There’s more to this story I’m sure and I look forward to learning more about her as I try to interpret the messages she leaves. If you have a chance, go out and stalk your gardens and be wowed by what you find.