There is yellow, and then there is the YELLOW of the mariposa lily, Calochortus clavatus. Remarkable in its brightness and purity, its yellow is one of the most intense and vibrant concentrations of color I have seen in the chaparral.

It is relatively uncommon, and this is one of a few seen along trails in Rocky Peak Park, and the Simi Hills. Of the varieties listed in the Jepson Manual, this appears most similar to the slender mariposa lily (Calochortus clavatus var. gracilis).

The insect emerging from the flower is a small bee -- probably a species of Perdita (Andrenidae). These bees were found on several of the mariposa blossoms along the trail. They were usually near the gland near the base of each petal, and partially hidden by the club-like hairs that gives the species its name.

From a run earlier this week in Rocky Peak Park.

Related posts: Mountain Mariposa, Plummer's Mariposa Lily

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The bright orange-red coloration of these immature large milkweed bugs (Oncopeltus fasciatus) is a warning to predators that they taste bad. Like monarch butterflies, they concentrate foul-tasting compounds from the narrow-leaf milkweed (Asclepias fascicularis) in their bodies.

Following several instars (molts), the nymph is transformed into the adult insect.

The photograph is from a run at Sage Ranch on July 23, 2007.

A bee forages on Bigelow's sneezeweed (Helenium bigelovii) at Little Jimmy Spring. From Sunday's Islip - Baden-Powell loop.

Mariposa lilies (Calochortus invenustus) blooming through the palmate leaves of a lupine at about 8500 ft., near Sawmill Mountain, west of Mt. Pinos.

According to data from the Consortium of California Herbaria, this species was documented in the Mt. Pinos area as early as 1897.

The wasp-like insect is a hover fly, probably Chrysotoxum festivum.

From Sunday's Mt. Pinos-Mt. Abel Out & Back run.

Related posts: Plummer's Mariposa Lily, Bee Fly On Western Wallflower

Perfectly sized to work the minute central disk flowers of golden yarrow, a tiny insect -- perhaps a syrphid fly -- hovers a few millimeters from the plant, assessing the risk of continuing to feed.

The compound flower head of the golden yarrow (Eriophyllum confertiflorum) is about the size of a green pea (10mm), and the individual disk flowers at its center are about 1/5 as large (2mm).

From a run at Sage Ranch Park on May 28, 2007.

Related post: Bee Fly on Western Wallflower.

We received a little rain in the Los Angeles area earlier this week. There was just enough light rain to dampen my shirt, muddy my running shoes, and ornament this web with droplets of water. Refreshing as it was, the precipitation did little to relieve our ongoing drought.

An ant forages among the florets of a wreath plant.

I've run past wreath plants thousands of times in the chaparral of local open space areas. At a glance, the nondescript wiry brown plant isn't very appealing. But, it's one of a few plants you'll see blooming in the chaparral in the Fall, so on a run this last November I took a closer look. This revealed a lavender-tinged composite flower that is anything but mundane. And, as I was to discover, a case of probable mistaken identity, and an example of one of the ways new species occur.

On a chilly October morning, following a cold night at 9400 ft., a Seven-spotted Lady Beetle is slow to move from her bivouac amid the blossoms of a Rabbitbrush.

The photo is from the North Backbone Trail Revisited hike and run.

Fanged and clawed, death waits,
On a highland of lavender, near a saffron spire.

The silhouette of a crab spider on the petal of a back lit Purple nightshade (prob. Solanum xanti). The blossom is about 0.8 inch (~20 mm) wide, which would make the span of the spider's crab-like grasping forelegs about 0.25 inch (~7 mm). From a run at Sage Ranch Park on November 2, 2006.

Note: This is not a photo of Deadly nightshade (Atropa belladonna).

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Sylvan Hairstreak (Satyrium sylvinus) on California Goldenrod (Solidago californica) at Sage Ranch Park.

Cucumber Beetles (Acalymma trivittata) munching on the pistillate blossom of the wild gourd Calabazilla (Cucurbita foetidissima). The photograph is from Sunday's Ahmanson-Cheeseboro run.

A Blue Milkweed Beetle (Chrysochus cobaltinus) on a somewhat insect eaten Narrow Leaf Milkweed (Asclepias fascicularis).

Photograph was taken on a run on Laskey Mesa in Upper Las Virgenes Canyon Open Space Preserve (formerly Ahmanson Ranch).