Wild Flower Report   ¦  Field Trip Reports   ¦  Mammals   ¦   Birds   ¦  Cacti   ¦  Shrubs and Trees

Saguaro National Park - East
Tucson, Arizona

The city of Tucson has continued to grow in population and area such that protected areas like the national parks and forest are rimmed in by urban sprawl. From the convenience of the urban environment hikers can hike straight into some of the most beautiful desert environments anywhere in the world. The danger is that proximity to densely populated areas could effect vulnerable or keystone species. Stray pets, hunting, watered lawns, road kills, noise, light polution, heat island effects, and drifting sprays of pesticides and fertilizers are all examples of threats posed by nearby population centers.

For now the forests of saguaro cactus and the hundreds of other plant and animal species can be easily observed from the loop drive and the many crisscrossing trails.

The high Rincon Mountains form the east boundry of the park and offer an important corridor for wildlife movements. From E. 22nd Street head southeast on Old Spanish Trail. The park entrance and headquarters are on the left just at Freeman Rd. The loop drive is one-way and offers numerous pullouts and several picnic areas. The scenery is truly breathtaking.

Sponsored Links

Field Trip: Aug. 28-29, 2016

The summer monsoon season for 2016 was sporadic and fitful. Several storms with substantial rain had watered this area followed by weeks without any rain. Ocotillos and palo verdes were in full leaf, but very few annuals had succeeded in growing robustly. Summer poppies (Kallstroemia), for example, were nowhere to be seen. Woody shrubs and especially the cacti are well adapted to deal with this precipitation regime. Many Fishhook Barrel Cactus had grand crowns of open red, yellow or orange flowers. It was hot and pretty humid, but every time I came upon another barrel in bloom I was glad to be out. I drove the loop drive where many visitors were bicycling or running. Otherwise crowds were scarce and most pullouts offered desert beauty and solitude. Paper flower and desert senna were in full bloom with bright yellow flowers. See the summer wildflower list below.

The following morning, Aug 29th was a Monday and I was surprised that the 20 or so parking spots on Broadway Mica Trailhead were filled at 6 a.m. It was a gorgeous morning with pleasant temperatures before 10 a.m. The Mica Trail is wide, level and smooth and thus easily walked by all. Birds, wildlife and all the cactus species were easily observed. The only annoyance was the number of Hippelates flies. These small insects are known also as eye gnats for their habit of gathering at the eyes and nose seeking a bit of moisture. The do not bite, but also pay little heed to insect repellant. Also seen were the workings of encrusting termites, a kind that never damages human dwellings. It is about a kilometer (less than a mile) from the trailhead to the Mica View picnic area on the loop drive. Hikers from the Broadway entrance should have a paid park entry.

Eye Gnats

Eye Gnats

Encrusting Termites

Encrusting Termites

Mica View Trail at Saguaro National Park. The bigger tree at left rear is velvet mesquite, cacti are Engelmann Prickly-pear, Staghorn Cholla, and in the far back Chain-fruit Cholla. Blooming yellow flowers are Paper Flower and the white flowers are Desert Zinnia.

Birds

Common Species from August Trip:

  1. Verdin -- Auriparus flaviceps -- Tiny birds, barely larger than a hummingbird. Drab gray brown with a majestic yellow head.
  2. Cactus Wren -- Campylorhynchus brunneicapillus -- Common and very vocal.
  3. Gila Woodpecker -- Melanerpes uropygialis
  4. Curve-billed Thrasher -- Toxostoma curvirostre
  5. Rock Wren -- Salpinctes obsoletus -- Very common little birds which frequently give spirited high pitched trills while perched atop prominants. Their drab gray and brown color blends perfectly with the desert colors.
  6. Black-tailed Gnatcatcher -- Polioptila melanura --
  7. Phainopepla -- Phainopepla nitens --
  8. Rufous-winged Sparrow -- Peucaea carpalis -- many singing through monsoon season.
  9. Common Raven -- Corvus corax -- Conspicuous, large, jet black birds that soar above looking for food.
  10. Greater Roadrunner -- Geococcyx californianus --
  11. Gilded Flicker -- Colaptes chrysoides

Given sufficient effort most of the Sonoran Desert Bird species are likely to be seen. White-winged Doves are abundant through the summer months, but head south abruptly around the end of August.

Cactus Wren  Verdin  Gila Woodpecker  Rock Wren  Phainopepla  Black-tailed Gnatcatcher  Rufous-winged Sparrow  Greater Roadrunner  Gilded Flicker  Common Raven  Mourning Dove  White-winged Dove 

Greater Roadrunner photo by Marc Borom.

Mammals

These were seen 27 to 28 Aug. 2016

  1. Harris's Antelope Squirrel -- Ammospermophilus harrisii
  2. Coyote -- Canis latrans
  3. Audubon's Cottontail -- Sylvilagus audubonii
  4. Antelope Jackrabbit -- Lepus alleni -- This one shown at right was carrying quite a few Rabbit Ticks.
Antelope Jackrabbit, Lepus alleni, photo © by Michael Plagens
Sponsored Links

 

Cacti

Mistly in order of abundance:
  1. Staghorn Cholla -- (Cylindropuntia versicolor)
  2. Engelmann Prickly-Pear -- (Opuntia engelmannii)
  3. Fishhook Barrel Cactus -- (Ferocactus wislizenii)
  4. Teddy Bear Cholla (Opuntia bigelovii) --
  5. Saguaro Cactus (Carnegiea giganteus) --
  6. Pencil Cholla -- (Cylindropuntia arbuscula)
  7. Chain-fruit Cholla -- (Cylindropuntia fulgida)
  8. Desert Christmas Cactus -- (Cylindropuntia leptocaulis)

Fishhook Barrel flowers can be orange, yellow or red!

Shrubs and Trees

More common species listed first. By no means is this an exhaustive list, just the more conspicuous ones that I observed.

  1. Foothill Palo Verde -- (Cercidium microphyllum)
  2. White-thorn Acacia -- (Acacia constricta)
  3. Paper Flower (Psilostrophe cooperi)
  4. Desert Zinnia -- (Zinnia acerosa)
  5. Wolfberry (Lycium spp.) --
  6. Desert Hackberry -- (Celtis ehrenbergiana)
  7. Fairy Duster -- (Calliandra eriophylla)
  8. Burrobush -- (Isocoma tenuisecta)
  9. Desert Holly -- (Acourtia nana)
  10. Cat-Claw Acacia -- (Acacia greggiii)
  11. Blue Palo Verde -- (Parkinsonia florida)
  12. Desert Senna (Senna covesii) --
  13. Globe Mallow (Sphaeralcea ambigua)
  14. Brickell Bush (Brickelia coulteri) --
  15. Milkweed Vine (Sarcostemma cynanchoides) -- growing among wash bank shrubs
  16. Mesquite (Prosopis velutina) - mostly along the washes
  17. Warnock's Snakewood -- (Condalia warnockii)
  18. Canyon Ragweed (Ambrosia artemesiafolia) - mostly along the washes
  19. Desert Mistletoe (Phoradendron californicum) - Parasitic shrub growing upon various desert trees including Palo Verde and Ironwood.
  20. White Bursage (Ambrosia dumosa) --
  21. Desert Tobacco (Nicotiana trigonophylla) --
  22. Brittle Bush (Encelia farinosa) --
  23. Ocotillo (Fouquieria splendens) --
  24. Golden Eye (Viguiera deltoidea) --
  25. Creosote Bush (Larrea tridentata) --
  26. Siphonoglossa -- (Justicia longii)
  27. Mesa Tansy Aster -- (Machaeranthera tagetina)
  28. Little-seed Muhly -- Muhlenbergia microsperma
  29. Jojoba (Simmondsia chinensis) -- large shrubs with leathery, dark olive green leaves
  30. Gray Thorn (Zizyphus obtusifolia) --
  31. Trixis (Trixis californica) --
  32. Wire Lettuce (Stephanomeria pauciflora) --
  33. Limber Bush -- (Jatropha cardiophylla)
  34. Janusia (Janusia gracilis) - a twisty, viney plant
  35. Snakeweed (Gutierrezia sarothrae) --
Photo © by Mike Plagens

Mesa Tansy Aster begins blooming in August contingent on adequate summer rains.

Photo © by Mike Plagens

The white flowers of Desert Zinnia appear in spring and again in late summer, again, contingent on adequate summer rains.


Wildflowers (reported by Susan C., obs. 27 Feb. 1998)

Brittlebush

Brittlebush

Desert Marigold

Desert Marigold

Orange Fiddleneck

Orange Fiddleneck

Desert Bladderpod

Desert Bladderpod

Lyre-leaf Jewel-flower

Lyre-leaf Jewel-flower

Desert Zinnia

Desert Zinnia

American Wild Carrot

American Wild Carrot

Narrow-leaf Popcorn Flower

Narrow-leaf Popcorn Flower

Fairy Duster

Fairy Duster

Desert Globe Mallow

Desert Globe Mallow

Blue Dicks

Blue Dicks

Arizona Lupine

Arizona Lupine

Blue Phacelia

Blue Phacelia

Purple Bladderpod

Purple Bladderpod

Parry Dalea

Parry Dalea

Jojoba

Jojoba

Sponsored Links


Sonoran Desert Naturalist Home Page

Desert Places

Field Guide


Copyright Michael J. Plagens, page created 15 March 98,
updated 17 Sept. 2016.