Stem tips ablaze...

from the summer heat, well, maybe that’s an exaggeration. The only splash of bright color in the high desert in early summer is provided by the vibrant broom snakeweed seen below.

Broom snakeweed (Gutierrezia sarothrae).

Forests of stamens...

topped with millions of anthers producing trillions of pollen particles in countless wildflowers during this season’s super bloom in the high desert is really hammering my allergies. It’s been quite miserable this year, especially if one likes to breathe freely.

Macro image of prickly pear cactus blossom showing the stigma (green bulb in center) surrounded by hundreds of stamens consisting of anthers at the tips of each filament. Amazing micro universe when one gets small.

Subterranean bee hive under construction...

by the engineering globe mallow bee (Diadasia diminuta) that collects pollen from the globemallow flower that is presently at peak bloom in Castle Valley. It’s quite fascinating to watch their activities, if one has the time and patience.

Vertical tubular “turrets” serve as entrances to the underground hive. The tallest seen here on the right is 1.25 inches (3.2 cm) high.

The inside diameter of the turrets is about 4 mm, but it appears that the subterranean part of the entrance to the hive is slightly larger in size.

Early stages of turret construction after the initial burrow entrance has been excavated. The bees gather finer-grained particles from the ejected material from their diggings and cement the turret with their saliva.

Bee applying saliva to the upper rim of the turret to cement small particles as the turret rises.

Part of the neighborhood still under construction. Note the freshly dug shallow burrow at the far left without a turret.

Fully loaded pollen bags on the hind legs of the globe mallow bee returning to a fully completed part of the hive.

Down the hatch with a heavy load.

Wide view of a portion of the hive.

Iridescent flashes of color on hummingbirds...

are structurally controlled by layers of tiny air bubbles on the feather’s surface, refracting and reflecting various wavelengths of light. The brightness and intensity of the iridescence is also dependent on the viewer’s angle relative to the Sun, and is demonstrated by the Black-chinned Hummingbird shown below.