It was a good day for a crab spider.

It was NOT a good day for a honey bee.

It's early evening and here's this bee foraging on a bluebeard plant, Caryopteris x clandonensis, totally unaware of the  ambush predator lying in wait.

The predator and the prey: Misumena vatia and Apis mellifera.

The hunter and the hunted.

A venomous bite and it's all over. 

These spiders, often called the "white death spider," are camouflage artists. They can turn colors, from yellow to white, or white to yellow. You'll often see yellow crab spiders on golden rod Solidago or a predominantly yellow plant, like blanketflower, Gallardia.

"These spiders change color by secreting a liquid yellow pigment into the outer cell layer of the body," according to Wikipedia. "On a white base, this pigment is transported into lower layers, so that inner glands, filled with white guanine, become visible. The color similarity between the spider and the flower is well matched with a white flower, in particular the Chaerophyllum temulum, compared to a yellow flower based on the spectral reflectance functions."

"If the spider dwells longer on a white plant, the yellow pigment is often excreted," Wikipedia says. "It will then take the spider much longer to change to yellow, because it will have to produce the yellow pigment first. The color change is induced by visual feedback; spiders with painted eyes were found to have lost this ability. The color change from white to yellow takes between 10 and 25 days, the reverse about six days. The yellow pigments have been identified as kynurenine and 3-hydroxykynurenine."

Who knew?

One thing's for sure: everybody eats in the pollinator garden.

What's for dinner?

A crab spider, camouflaged in our lavender patch, didn't catch a honey bee, a butterfly, an ant or a syrphid fly.

No, it nailed a green bottle fly.

We couldn't help but notice. The fly's metallic blue-green coloring stood in sharp contrast to the white spider.

One venomous bite to kill it. And soon the fly, Lucilia sericata, was toast. Milk toast.

Crab spiders don't build webs to trap their prey. They're cunning and agile hunters that spring into action when an unsuspecting prey appears on the scene. They belong to the family Thomisidae, which includes some 175 genera and more than 2100 species. And they're ancient: spiders date back 400 million years ago.

Do you like spiders? You should.

“Spiders are an incredibly diverse group with more than 50,000 species described with probably another 200,000 remaining to yet be discovered,” says spider expert Jason Bond, the Evert and Marion Schlinger Endowed Chair in Insect Systematics in the UC Davis Department of Entomology and Nematology.

It's worth repeating what Professor Bond said about spiders at the Bohart Museum of Entomology open house, “Eight-Legged Wonders,” on Saturday, March 9.

The five good reasons to like spiders:

1. Spiders consume 400-800 million tons of prey, mostly insects, each year. Humans consume somewhere around 400 million tons of meat and fish each year.
2. Spider silk is one of the strongest naturally occurring materials. Spider silk is stronger than steel, stronger and more stretchy than Kevlar; a pencil thick strand of spider silk could be used to stop a Boeing 747 in flight.
3. Some spiders are incredibly fast – able to run up to 70 body lengths per second (10X faster than Usain Bolt).
4. Athough nearly all 47,000-plus spider species have venom used to kill their insect prey, very few actually have venom that is harmful to humans.
5. Some spiders are really good parents –wolf spider moms carry their young on their backs until they are ready to strike out on their own; female trapdoor spiders keep their broods safe inside their burrows often longer than one year, and some female jumping spiders even nurse their spiderlings with a protein rich substance comparable to milk.

The itsy bitsy spider climbed up the water spout.
Down came the rain and washed the spider out.
Out came the sun and dried up all the rain
and the itsy bitsy spider climbed up the spout again.
--Nursery Rhyme

It was an itsy bitsy spider.

But it wasn't climbing up a water spout.

It was lurking, waiting for prey, on our Mexican sunflower.

This particular crab spider was quite visible--white on orange. Sometimes they're so camouflaged that you have to look twice to see them. We remember the perfectly camouflaged crab spider on a gold coin flower (Asteriscus maritimus). (See below).

Crab spiders belong to the family Thomisidae, which includes about 175 genera and more than 2100 species. Wikipedia tells us that "The common name crab spider is often applied to species in this family, but is also applied loosely to many other species of spiders. Among the Thomisidae, 'crab spider' refers most often to the familiar species of 'flower crab spiders,' though not all members of the family are limited to ambush hunting in flowers."

If there's any flower that should be crowned "Autumn's Majesty," that would be the Mexican sunflower (Tithonia rotundifolia), aka "Torch."

A member of the sunflower family (Asteraceae), it carries "the torch of life" throughout spring, summer and autumn, but it's especially important in autumn when few plants offer sustenance to insects, especially to migrating monarchs.  The colorful annual has been blooming in our yard since April, reaching 10-to 15-foot heights (thanks, drip irrigation).

What loves this delightful orange blossom, besides the human beings who grow it?

Over a weeklong period, we photographed dozens of autumn critters, including monarchs, Gulf Fritillaries, hover flies, honey bees and crab spiders.

Every bee garden needs an "Autumn Majesty" and the Mexican sunflower fills the bill. When it goes to seed, finches and other birds will take what's left.