By Ty Fitzmorris
August susurrates with storm and shower, interwoven with the cacophony of resonant thunder and the assonance of cicada song. In the high heat of summer, the monsoon rains turn the land to emerald, and it seems as though living things are everywhere. Many mammals are teaching their young to forage in this time of plenty, while young birds are on longer and longer forays away from their parents. Ectothermic animals, such as lizards and snakes, whose body temperatures are tied closely to ambient temperatures, are at their most active now, chasing insect and rodent prey, while insects, from the minute leafhoppers to the massive saturn moths, enter their time of greatest abundance.
Above Right: The youngest Acorn Woodpeckers fledge this month, and lean out of their nests in anticipation of their first flight. Photo by Ty Fitzmorris.
The majority of woody plants bear their seeds during this season, including Coffeeberry (Rhamnus californica), Chokecherry (Prunus virginiana), Apache Plume (Fallugia paradoxa), and all seven of our oak species. Many herbaceous (i.e. non-woody) plants are growing and flowering now, most of which are specialist monsoon plants and did not appear in the spring. This is the time of plenty for many birds and mammals, as insects of all types proliferate, from giant moths to enormous strange and beautiful beetles, to dragonflies, who reach their peak now, while alien-like cicadas measure the day’s heat with their shrill cries. This second flowering brings with it a glut of insect prey, which sends a wave of life through our ecosystems — from the predatory insects to the lizards, birds, bats, and even terrestrial mammals.
Among the insects August marks the beginning of the time of the giants. Massive moths with 4- to 6-inch (and greater) wingspans, such as the sphinx moths, saturn moths, and the massive Black Witch Moth (Ascalapha odorata), which can have an 8-inch wingspan, fly for miles searching for mates, while Grant’s Hercules Beetles (Dynastes granti), Rhinoceros Beetles (Xyloryctes jamaicensis) and Longhorn Oak Borers (Enaphalodes hispicornis) bumble to porch lights and streetlights. The Grand Western Flood Plain Cicada (Tibicen cultriformis) flies in large numbers, providing many species of birds and mammals with food, while all eight of our preying mantid species can be seen. The proliferation of giants happens now because their larger bodies have required longer to grow to their massive size and so have timed their metamorphism into their adult forms for this resource-rich time of the year, when both food and egg-laying sites are abundant.
During the day, butterflies, beetles, dragonflies, and damselflies are at their most prolific during the monsoonal season. Many of the butterfly species out now fly only during this time of year, and the damsels and dragons are groups that are notably absent during the spring, though they are virtually everywhere now, from parking lots to lakes. Our flagship monsoon butterfly is the Arizona Sister (Adelpha eulalia), which glides over riparian clearings near oak stands. Look also for Buckeyes, Queens, Monarchs, and Pipevine and Two-tailed Swallowtails. In all, the wild diversity of living creatures this month is dizzying.
A Very Brief Survey of What’s Happening in the Wilds
• Little Brown Bats (Myotis lucifugus) continue nursing their young. Their roosts are often in caves, or cavities in trees, but sometimes they roost communally in buildings. Amazingly, a nursing mother can eat up to 110 percent of her body weight every night of insects, many of which are pests of humans.
Right: Twelve-spotted Skimmer dragonflies (Libellula pulchella) hunt for flies, caddisflies and other small insects above most of our flowing monsoon creeks. Photo by Ty Fitzmorris.
• The leaves of some deciduous trees, such as Boxelder (Acer negundo), which grow in riparian drainages, begin changing color. The reason for this early change in creekside vegetation is partly that high elevation creeks act as ‘cold-air drainages,’ in which colder (and therefore heavier) air flows down them, creating colder environments than in adjacent uplands. This is one of the ways in which the earliest effects of autumn migrate from the highlands to the lowlands.
• Convergent Lady Beetles (Hippodamia convergens) gather in the tens of thousands in crevices in rocks and plants in the high mountains.
Visit: Dandrea Trail, No. 285.
Ponderosa Pine Forests
• Yarrow (Achillea millefolium) in flower. This is one of the most storied of our plants, and has been used as a medicinal plant by many cultures, dating reliably back to the Neanderthals. In ancient Greek lore, Yarrow appeared from the scrapings of Achilles’ spear (hence the genus name), and was used to heal Telephus’ wound, and has since been used for everything from immune support to wound treatment to small pox.*
• Golden Columbine (Aquilegia crysantha) flowers by cooler mountain streamsides, while sedges bear their seeds and Wright’s Deervetch (Lotus wrightii) continues to flower. Other flowers include Scarlet Gilia (Ipomopsis aggregata), Scruffy Clover (Dalea albiflora), Silverstem Lupine (Lupinus argenteus), and Wild Geranium (Geranium caespitosum), and many others.
• Coffeeberry (Rhamnus californica) bears its delicious black fruits. The fruits have a sweet coffee flavor and a large coffee-bean-like seed.*
Visit: Aspen Creek Trail, No. 48.
• Many different types of “June beetles” fly now. Our most distinctive species is the Ten-lined June Beetle (Polyphylla decemlineata), of the scarab family, which is often drawn to porchlights.
• Chokecherries (Prunus virginiana) fruiting. These fruits can be small and tart or large and sweet, depending on the year. When they are larger, they rival store-bought cherries for sweetness, and outdo them for flavor.*
• Oaks of all species bear their acorns, providing the largest overall food crop of the year for mammals and birds, most notably the Acorn Woodpecker.
• Deep blue-purple four o’clocks (Mirabilis spp.) flower on hillsides.
Visit: Miller Creek Trail, No. 367.
• Sacred Datura (Datura wrightii) flowers exuberantly in the evenings. These large white trumpet-flowers glow in the dusk, attracting moths and bats. This species has been mistakenly described as having hallucinogenic properties, a piece of terrible misinformation that has resulted in many poisonings and some permanent blindness. No part of Datura should EVER be ingested.
• Our several species of brickellbush (Brickellia spp.) begin flowering. These inconspicuous flowers are not often seen, but their extraordinary aroma suffuses the dusk air. Arizona is home to more than two dozen species of Brickellia, several of which have been found to be very effective in the treatment of certain types of diabetes.
Visit: Juniper Springs Trail, No. 2.
• Yellow and white species of evening primroses (Oenothera spp.) flower exuberantly and are visited by White-lined Sphinx Moths (Hyles lineata), which are often mistaken for small hummingbirds.
• Sunflowers (Helianthus annuus) begin their great seasonal flowering here in the Southwest, where they are native. Look for “longhorn” Melissodes bees, as well as iridescent green Agapostemon and Augochlora bees, foraging on their flowers.
• Purple and white-flowered nightshades (Solanum spp.) begin flowering.
Visit: Mint Wash Trail, No. 345.
Rivers, Lakes, & Streams
• All of our creeks run exuberantly, often overspilling their banks.
• Our annual explosion of cicadas continues, bringing ear-shattering noise to the Central Highlands. Even though this species, Tibicen cultriformis, is ubiquitous to us, it is only found in the Central Highlands. These cicadas live for several years underground, feeding on tree roots, and only appear to us at the very end of their lives, when they stop feeding altogether, grow wings, and call to each other to attract mates.
• Scarlet Cardinal Flower (Lobelia cardinalis) and bright Yellow Monkey Flower (Mimulus guttatus) bloom, drawing Two-tailed Swallowtails to their nectar.
• Snails become active in streamside vegetation. Arizona is home to more than 200 species of snails, most of which are largely unstudied.
• Swallows and bats abound near creeks, consuming large amounts of insects, mainly flies and small moths.
• Many species of dragonflies and damselflies hawk over the water, patrolling territories. Look for dancer, bluet and rubyspot damsels, and spiketail, saddlebag, and skimmer dragons, and especially the massive Giant Darner (Anax walsinghami), which has up to a 5.5-inch wingspan, and is the largest dragonfly in the US.
Visit: Bell Trail, No. 13.
• Prickly pears (Opuntia spp.) bear their fruits. These spiny fruits provide food for many species, including humans.
• As Coyote Gourd (Cucurbita palmata) and other squashes flower, native Xenoglossa and Peponapis bees begin pollinating them, and sleeping in the flowers in the afternoon. The Coyote Gourd is not edible, though our cultivated squash are beginning to flower also. Look for the flowers of any of the squashes or gourds once they have closed in the afternoon, and pull them open gently to look for these bees. They are extremely gentle and will not sting unless harassed.
• Paloverdes and mesquites bear their seeds now, as do Southwestern Coral Beans (Erythrina flabelliformis), the poisonous seeds of which are sometimes used for jewelry.
Visit: Algonquin Trail, No. 225.
* Always consult with a trained professional before ingesting any part of a wild plant. This information is not intended to encourage the attempted use of any part of a plant, either for nutritive or medicinal purposes.
Prescott Weather: August
Average high temperature: 86.1 F (+/-2.4)
Average low temperature: 56.4 F (+/-3.3)
Record high temperature: 102 F (1905)
Record low temperature: 32 F (1968)
Average precipitation: 3.20" F (+/-1.93")
Record high precipitation: 10.51" (1971)
Record low precipitation: 0.11" (2002)
Max daily precipitation: 3.15" (Aug. 22, 1960)
Source: Western Regional Climate Center
Skyward: August 2017
• Aug. 7: Full Moon at 11:11 a.m. and partial lunar eclipse (not visible from North America).
• Aug. 11: The Perseid Meteor Shower peaks after midnight. This is one of the year’s brightest and often most dazzling meteor showers, one of the best meteor showers of the year, with up to 60 meteors per minute. These meteors are dust particles left behind by Comet Swift-Tuttle, a very large comet that swings through our solar system every 133 years, and which last appeared in 1992. The average velocity of the Perseid meteors is 39 miles per second, much faster than the meteors of last month’s showers. This year, the waning gibbous Moon will wash out many of the fainter meteors, but it won’t rise high in the sky until after midnight, so viewing should be excellent up until then.
• Aug. 21: New Moon at 11:30 a.m. and Total Solar Eclipse from 8:45 a.m. to 1 p.m. This is the first total solar eclipse to be entirely visible from North America since 1994, and arguably the most important astronomical event of the year (for those of us in North America, that is). The path of totality is roughly 70 miles wide, and follows a shallow arc from northern Oregon to central South Carolina, with the longest period of total eclipse occurring in Hopkinsville, Kentucky. This event, which has been dubbed the Great American Eclipse, is drawing unprecedented national interest and festivals and gatherings are planned all along this route. The darkest part of the Moon’s shadow will pass over Prescott from 9:48 a.m. until 1:02 p.m., during which time the sky will gradually darken to dusk levels, causing a chorus of confused singing from crepuscular insects and songbirds, as well as unusual behavior from many other animals. This is truly an event not to miss, and one which will not reoccur on our continent until 2024.
• Safety Note for Eclipse-Watchers: While the eclipse will be visible from Prescott, we will only see the Moon cover about 70 percent of the Sun from our position, leaving a blinding 30 percent of the Sun uncovered at maximum eclipse. It is therefore extremely important to view the eclipse using appropriate techniques, which include either eyewear designed and certified specifically for this purpose — (according to NASA, “Five manufacturers have certified that their eclipse glasses and handheld solar viewers meet the ISO 12312-2 international standard for such products: American Paper Optics, Baader Planetarium (AstroSolar Silver/Gold film only), Rainbow Symphony, Thousand Oaks Optical, and TSE 17”), or any of a number of projection techniques, such as pinhole cameras and projection on a screen from reversed binoculars or a telescope. Homemade viewing equipment and welding helmets are NOT RECOMMENDED and can lead to blindness. For safest viewing, visit the Eclipse Celebration at the Prescott Valley Public Library from 9 a.m.-1 p.m.
Each month, the Peregrine Book Company's proprietor, Ty Fitzmorris writes about the naturally occurring events around Prescott's Central Highlands. Also see: News from the Wilds, published monthly in 5ensesmag.com.