






































Iguana 12.1


14 IGUANA  •  VOLUME 12, NUMBER 1  •  MARCH 2005 WIEWANDT

GILA MONSTER (Heloderma suspectum).—This non-aggressive resident of the Sweetwater area is our largest, most fabled, and only ven-
omous lizard in the United States. Few people have had the good fortune to see one in the wild. These secretive reptiles have large home
ranges that span a mile or more and are readily displaced by urban sprawl. They occasionally turn up in swimming pools.



IGUANA  •  VOLUME 12, NUMBER 1  •  MARCH 2005 15

Saving crucial habitat is by far the most effective means of
conserving wildlife. Traditionally, conservationists have abdi-

cated this responsibility to institutions, public or private — but
sometimes individuals have to take the initiative into their own
hands. Following is a step-by-step guide based on the successful
establishment of the Sweetwater Reserve near Tucson, Arizona.

Step 1: Recognize the Opportunity — and Act!
Identifying a parcel of land of ecological importance is critical.
Even experienced biologists, trained to recognize biological val-
ues that might be missed by the amateur, cannot do it alone.
Ecologists may know to consider parcel size, its ecological diver-
sity, and its connections with other protected natural areas.
These are crucial attributes. Land lacking even one of these ele-

ments probably doesn’t warrant protection. Opposition to the
proposal will quickly recognize and exploit such inherent weak-
nesses. However, biological significance isn’t enough. An area’s

The Sweetwater Strategy: 
Saving Habitat at the Grassroots Level

Thomas Wiewandt

Wild Horizons, Tucson, Arizona

Photographs by the author except where indicated.

SWEETWATER STRATEGY

q

SWEETWATER PRESERVE.—This view is to the northeast toward Tucson, as seen from the western end of the Sweetwater property. Tucson and the
Santa Catalina Mountains appear on the distant horizon. Saguaro-studded hills in the foreground block views of homes along Camino del Cerro.

OUR GOAL: 
Acquisition of Sweetwater Preserve by a pub-
lic agency for conservation and open space
purposes to help achieve the goals of the
Sonoran Desert Conservation Plan.



16 IGUANA  •  VOLUME 12, NUMBER 1  •  MARCH 2005

recreational potential and aesthetic appeal must be taken into
account. Selling the idea of a sanctuary that would be “off-lim-
its” to people is much more difficult than promoting one with
some carefully managed recreational potential and visual appeal.
To effectively integrate such varied concerns, a team that
includes nature lovers such as birders, hikers, campers, artists,
and ordinary citizens is necessary.

Once an area has been identified, act quickly! Determine
who owns the land and investigate its potential for acquisition.
Trying to stop a project after the property has been sold to a
developer almost invariably proves futile.

Step 2: Organize
Like-minded citizens should meet to discuss the proposal and
develop an action plan. An effective group should include sci-
entists and the nature lovers to which we alluded above, but a
consortium that effectively solicits support from individuals with
a wide variety of skills will have a much higher probability of
success. Involvement of persons such as attorneys, writers, pho-
tographers, real estate agents, graphic designers/publishers, and
community members skilled in public speaking and political
activism will dramatically enhance the likelihood of success.

Part of any effective action plan is the recruitment of an
appropriate broker to negotiate the acquisition. Ideally, this
would be a widely recognized and reputable conservation organ-
ization such as The Nature Conservancy, an Open Land Trust,
the Trust for Public Lands (TPL), or comparable regional and

WIEWANDT

FISHHOOK BARREL CACTUS (Ferocactus wislizeni).—Succulent surprises abound within the Sweetwater Preserve. Dense stands of young Saguaros
(Carnegiea gigantea) and ancient barrel cacti of enormous proportion populate the land. Flowers of the barrel cacti open in July and August dur-
ing the summer rainy season, providing nectar and pollen for native bees. In autumn, Mule Deer (Odocoileus hemionus), Antelope Ground Squirrels
(Ammospermophilus sp.), and Curved-billed Thrashers (Toxostoma curviostre) are among the animals that feast on the lemon-yellow fruit.

Sweetwater Preserve: Key Points
Size and Diversity

Proximity to Other Conservation Areas

Watershed and Riparian Habitat

Vertebrate Species of Concern

Cultural and Historic Resources

Viewsheds

Trails



SWEETWATER STRATEGY

even international entities. In some cases, this organization even-
tually would become the owner/steward of the property; in oth-
ers, they would act as an intermediary between the land owner(s)
and the recipient organization, e.g., a city or county government.
Representation by such an institution lends credibility to the
effort. Not only does it remove the possibility of criticism that
those involved seek to benefit personally in any way, but such
entities do not become engaged in proposals that lack substance,
and their participation provides a means of soliciting financial
support via deductible contributions.

In the Sweetwater effort, the neighborhood group worked
with the Tucson Mountains Association and TPL. TPL entered
a prolonged and difficult three-year negotiation with the own-
ers on behalf of Pima County, Arizona, and eventually pur-
chased the land for the county government, a loan to be repaid
with funds raised through a local bond election.

Step 3: Prepare a Report
A visually and intellectually enticing document is essential for
moving the project forward — and the difficulty of doing this
effectively should not be underestimated. Experience and expert-
ise are critical. Seek outside help if the assembled team doesn’t

already include such persons. A poorly written and poorly exe-
cuted report will waste everyone’s time and will almost inevitably
doom the project to failure.

IGUANA  •  VOLUME 12, NUMBER 1  •  MARCH 2005 17

DESERT SPADEFOOT TOAD (Scaphiopus couchii).—Awakened by vibra-
tions from pounding raindrops during violent summer storms, spade-
foot toads emerge to breed in temporary puddles in arroyos. Life in the
water — from egg to tadpole to toadlet — can be completed in less than
two weeks. By eating only one big meal of termites, adults can outwait
fickle rains and make it through another year of sleep underground.

Sweetwater Timeline

June 2000 Tucson Mountains Committee (TMC) prepares report identifying Sweetwater as the largest remaining tract of
undeveloped land in the eastern Tucson Mountains

March 2001 Community members meet with county supervisor and are directed to prepare a detailed report and to talk with
the Trust for Public Land (TPL) to solicit their support in acquiring the property

July 2001 TPL meets with county supervisors, the county administrator, and the Tucson Mountains Association (TMA)
and agrees to assist the county and community in efforts to secure Sweetwater

September 2001 TMA Sweetwater Preserve Committee completes report and presents it to county supervisors, the National Park
Service, and the Arizona congressional delegation

October 2001 Began ongoing process of soliciting endorsements from diverse community, environmental, and governmental
organizations; in all, 52 endorsements were secured, including: National Park Service, Arizona Sonoran Desert
Museum, Coalition for Sonoran Desert Protection, Pima Trails Association, Southern Arizona Hiking Club,
Neighborhood Coalition of Greater Tucson, Tucson Pima County Historical Commission, Sierra Club, Tucson
Mountain Riders, Arizona Daily Star

November 2001 TPL begins negotiations with the landowners to secure an option for the potential acquisition of Sweetwater

August 2002 TPL completes negotiation of terms of option contract; TMA raises > $30,000 for option payment contribu-
tion

November 2002 TPL and the landowners sign the option contract for the 620-acre Sweetwater parcel with the understanding
that a bond election is planned for May 2003; property owners begin survey of property to plan development
in the event the bond does not pass

December 2002 Supervisors delay bond vote until November 2003

July 2003 Supervisors delay bond vote until May 2004

December 2003 TPL/landowner option agreement expires; TPL negotiates a contract extension through mid-June 2004, requir-
ing additional option payment and firm TPL purchase commitment by February 2004; additional 80 acres added
to the project after consultation with county and community/environmental groups

February 2004 Purchase agreement completed; Pima County Board of Supervisors approve purchase of Sweetwater (with con-
tingencies) by a 5–0 vote

May 2004 “Open Space” bond passes with Sweetwater as the first property listed; final appraisal provided by TPL to county
for review and approval

October 2004 Sweetwater Nature Preserve becomes a Pima County Park



The document should be concise, yet filled with com-
pelling facts and a sense of urgency. This will require the engage-
ment of specialists to make surveys and assessments to broaden
the appeal of the project and strengthen its case. If possible,
include critical habitat for rare or endangered species, but keep
the focus broad. The Endangered Species Act offers tremendous
legal clout, but emphasizing the integrity of the whole endeavor
will help build wider community support for a conservation
project and alleviate possible fear of excessive governmental
interference on the part of those who own property adjacent to
the focal parcel.

Prepare the report so that it is easy to digest. Assume that
important decision-makers, whose support (or lack of opposi-
tion) is crucial, won’t take the time to study in detail every doc-
ument that comes their way. Use engaging photographs with
descriptive captions, an “Executive Summary,” and sidebars or
pullouts to emphasize key points. Ask yourself, “Would someone
completely unfamiliar with this project come away with a full
grasp of its significance by just reading the Executive Summary,
the photo captions, and the highlighted bits of text?” If the
answer is “yes,” the report will most likely serve its purpose.

Have the document professionally designed and printed.
Local designers and printers who identify with your cause will
often do the job at cost or even offer their services for free. In
the Sweetwater project, the designer discounted her services; and
one printer handled the color pages while another did the black-
and-white printing, collating, and binding — all at their cost. A
supporter paid for the design and printing services, channeled
through a non-profit organization (TPL) to make this a tax-
deductible contribution.

Step 4: Form Alliances
With a convincing report in hand, circulate copies to important
individuals and community organizations for support. Seek
written endorsements from a broad base, including such groups
as neighborhood associations, newspapers, women’s organiza-
tions, experts on natural resources, hiking clubs, and conserva-
tion societies. The more, the better — keeping in mind that sup-
port from persons and groups with disparate agendas will
strengthen dramatically the appeal of the proposal to decision-
makers. Add such letters of support to the document.

18 IGUANA  •  VOLUME 12, NUMBER 1  •  MARCH 2005 WIEWANDT

Despite the pace of development on the West Side over
the last 20 years, large portions of the desert landscape

remain relatively undeveloped. One of the more pristine
areas is a 615-acre tract in the foothills of the Tucson
Mountains near the western extremity of Sweetwater Road.
It’s a remarkably scenic and peaceful slice of the Sonoran
Desert, but in the absence of county action, it may one day
be turned into another resort.

The land is now owned by Sweetwater Properties,
Inc., a company partly controlled by local investors who
evidently are willing to sell if the price is right. The Tucson
Mountains Association wants to see the land turned into a
nature preserve that would be open to the public for hik-
ing, horseback riding and bicycling. A deal is in the works,
but its success depends partly on public donations and
partly on county action.

The owners of the tract say they’ll take the land off the
market for a year if somebody comes up with the $40,000
property tax payment due on November 15.

The Tucson Mountains Association has raised approx-
imately $18,000 and the Trust for Public Lands, a national
conservation organization, has agreed to put up $20,000.
This is a cause worth supporting. It potentially will have
long-range benefits for the entire community, both in terms
of outdoor recreation opportunities and the preservation of
plants and animals native to the Sonoran Desert.

Success or failure hinges to a large extent on whether
the Pima County Board of Supervisors votes to include the
Sweetwater property in a bond election that will be held
next year. The board’s vote is expected early next month. A
spokesman for the Tucson Mountains Association says it
will not cash any of the donations it has received until it
knows for certain that the property will be included in the
bond election that will be held next May.

The land in question is a stone’s throw from the east-
ern boundary of Saguaro National Park. The University of
Arizona’s entomological research station is about a quarter
mile to the south. The county’s extraordinary Tucson
Mountain Park is also nearby. This is an area that is popu-
lated but not densely developed. It should be kept that way.

The proposed Sweetwater Preserve is a rare opportunity
for the community. The property would make an excellent
regional park that could be managed to protect wildlife cor-
ridors and the rare vegetation native to the Sonoran Desert.

At present, the fate of this project is precarious. The
land has not yet been appraised and no one knows beyond
a doubt what its market value is. The owners — so far the
names of those involved in Sweetwater Properties Inc. have
not been disclosed — are willing to delay any sale if some-
body else pays the property taxes until the matter is settled.
For the public, this remains a risky investment but one with
potentially great rewards.

B U Y I N G  T I M E
Arizona Daily Star, 22 October 2002

continued on p. 22



IGUANA  •  VOLUME 12, NUMBER 1  •  MARCH 2005 19SWEETWATER STRATEGY

Work diligently at soliciting local support. Educational programs
aimed at the local populace, especially school children, will elicit
positive local media coverage. Establish rapport with reporters
and write letters to editors and station managers. The more peo-
ple who are aware of the proposal and convinced of its value, the
more likely will be the eventual success of the project.

Arrange for special meetings with state, county, and city
officials to enlist their support (emphasizing the need for involv-

TIGER RATTLESNAKE (Crotalus tigris).—This attractive reptile lives only
in the desert mountains of southern Arizona and northern México.
Thirty years ago, this species was relatively common in Tucson
Mountain Park near Gates Pass; today it is rare there. It is unprotected,
prized by snake collectors, and, like many desert reptiles, suffers heavy
mortality on paved roads. Paved roads trap heat, so heat-seeking pedes-
trians — reptiles and amphibians — often linger on these warm sur-
faces. Tiger Rattlesnakes still are seen regularly in the Sweetwater
Preserve area.

Reptiles of the Tucson
Mountains2

LIZARDS: Western Banded Gecko (Coleonyx variegatus),
Mediterranean Gecko (Hemidactylus turcicus)*, Desert Iguana
(Dipsosaurus dorsalis), Spiny-tailed Iguana (Ctenosaura
hemilopha)*, Lesser Earless Lizard (Holbrookia maculata),
Greater Earless Lizard (Cophosaurus texanus), Common
Collared Lizard (Crotaphytus collaris), Long-nosed Leopard
Lizard (Gambelia wislizenii), Desert Spiny Lizard (Sceloporus
magister), Clark’s Spiny Lizard (Sceloporus clarkii), Side-
blotched Lizard (Uta stansburiana), Tree Lizard (Urosaurus
ornatus), Regal Horned Lizard (Phrynosoma solare), Giant
Spotted Whiptail (Cnemidophorus burti stictogrammus)**,
Sonoran Spotted Whiptail (Cnemidophorus sonorae)**,
Western Whiptail (Cnemidophorus tigris)**, Gila Monster
(Heloderma suspectum).

SNAKES: Western Blind Snake (Leptotyphlops humilis),
Spotted Leaf-nosed Snake (Phyllorhynchus decurtatus)***,
Saddled Leaf-nosed Snake (Phyllorhynchus browni)***,
Coachwhip (Masticophis flagellum), Sonoran Whipsnake
(Masticophis bilineatus), Western Patch-nosed Snake (Salvadora
hexalepis), Glossy Snake (Arizona elegans), Gopher Snake
(Pituophis melanoleucus), Common Kingsnake (Lampropeltis
getula), Long-nosed Snake (Rhinocheilus lecontei), Black-
necked Garter Snake (Thamnophis cyrtopsis), Banded Sand
Snake (Chilomeniscus cinctus)****, Southwestern Black-headed
Snake (Tantilla hobartsmithi), Lyre Snake (Trimorphodon bis-
cutatus), Night Snake (Hypsiglena torquata), Western Coral
Snake (Micruroides euryxanthus), Western Diamondback
Rattlesnake (Crotalus atrox), Sidewinder (Crotalus cerastes),
Black-tailed Rattlesnake (Crotalus molossus), Tiger Rattlesnake
(Crotalus tigris), Mojave Rattlesnake (Crotalus scutulatus).

TURTLE: Desert Tortoise (Gopherus agassizii).

* introduced
** North American lizards formerly assigned to Cnemidophorus are

now placed in the genus Aspidoscelis
*** confirmation is needed nearer the mountains
**** Sand Snakes are now placed in the species Chilomeniscus

stramineus (see Iguana 11(1), p. 7).

1 This and all other boxed items were excerpted from the Sweetwater
Preserve and Sonoran Desert Conservation Plan, prepared by the
Tucson Mountains Association Sweetwater Preserve Committee,
September 2001.

2 Compiled by Cecil Schwalbe and Taylor Edwards. Note that not all
species listed are found within the Sweetwater Preserve.

Dense stands of the saguaro cactus populate Sweetwater
Preserve, and young plants are numerous…. During the

early summer dry season, when food and water are often crit-
ically scarce, the saguaro provides the desert’s only source of
moist fruit; and the multitude of animals that feed on it are as
diverse as wasps, bats, javelinas, and woodpeckers.

MOUNTAIN LION (Puma concolor).—Many of us who live in Tucson
dream of the day when we can capture an image like this one in the
wild. Symbol of the Arizona-Sonoran Desert Museum and pho-
tographed there, this magnificent cat still roams our desert mountain
ranges. In recent years, Mountain Lions have been observed on several
occasions in the Sweetwater area.



20 IGUANA  •  VOLUME 12, NUMBER 1  •  MARCH 2005 WIEWANDT

XERORIPARIAN HABITAT AND THE 700-ACRE SWEETWATER PRESERVE.—Habitats with intermittent water supplies are vital to the welfare of more
than toads, they help sustain most wildlife in the Tucson Mountains. Besides providing opportunities to drink, desert streambeds offer food and
shelter that is unavailable or less desirable elsewhere. For many large mammals, arroyos serve as roadways, making travel across desert terrain quick
and easy. Four major washes on Sweetwater Preserve have been identified by Pima County as important Xeroriparian “A” habitat; i.e., that of great-
est value to wildlife. Sweetwater Drive and adjacent areas with low-density private dwellings is on the left, two major tributaries of Sweetwater
Wash join as they intersect with Blue Bonnet Road in the lower left, and hiking/equestrian trails can be seen to the north (right) of these impor-
tant natural watercourses. Photograph taken from an ultralight aircraft by Adriel Heisey.

The 700-acre Sweetwater Preserve in the Tucson
Mountains is now on the verge of public ownership,

after the Board of Supervisors took a crucial step Tuesday
toward buying it.

The board approved the sale of $11.7 million in bonds
to cover Sweetwater’s purchase. The vote came more than
three years after neighbors of the parcel near Tortolita Road
south of Camino de Oeste launched a campaign to save it.
The sale, part of a larger sale of $65 million in county
bonds, gave the Trust for Public Land the assurance it needs
to buy Sweetwater from its private owners, County
Administrator Chuck Huckelberry said.

The county will in turn buy the land from the trust.
By the end of June, the county will buy the

Sweetwater preserve area, lying in the shadow of Saguaro
National Park West and Tucson Mountain Park. This will
be the first major purchase with the county’s new, $174
million open-space bonds voters approved in May.

On Tuesday, the private, nonprofit trust sent a title company
the money for the land. Formal closing will occur in a week, said
Michael Patrick, the trust’s Sweetwater project manager.

The parcel’s size, its classically Sonoran mix of saguaro,
ocotillo, prickly pear, creosote, palo verde and the scenic
mountain views it affords have long made it a priority for its
neighbors and many other Tucson environmentalist to buy.

In February, supervisors unanimously agreed to its
purchase if three other conditions were met: voter approval
of the open-space bonds, county approval of a property
appraisal and a recommendation for the purchase by the
Conservation Acquisition Commission.

But partly because of the parcel’s high cost and because
the board approved it before the open-space bond vote in
May, the purchase has had critics.

Last week, five acquisition commission members
abstained on the recommendation. Three members sup-
ported it. But nobody spoke against the Sweetwater pur-
chase Tuesday.

Debbie Hecht, co-chairwoman of the Sweetwater
Nature Preserve Committee, told the board that Tucson
Mountain residents had put in countless volunteer hours
and raised tens of thousands of dollars to help keep an
option alive to buy the property. 

SWEETWATER PURCHASE IS NEARING REALITY
Tony Davis (Arizona Daily Star, 16 June 2004)



IGUANA  •  VOLUME 12, NUMBER 1  •  MARCH 2005 21SWEETWATER STRATEGY

The County’s Open Space Bond was approved in a
landslide victory on May 18, 2004, with the voters of

Pima County approving $174 million to acquire lands for
protecting biologically important habitat, providing addi-
tional open space for the community and preventing urban
encroachment of Davis-Monthan Air Force Base.

Pima County announced on June 11, 2004 that it
completed the purchase of the Sweetwater Preserve, 695-
acres of important biological habitat and open space land
in the Tucson Mountains, with assistance from the Trust for
Public Land. The property will be set aside for permanent
use as a recreational and natural resource area and as an
addition to the County’s Tucson Mountain Park. This
acquisition is the first land protected using funds from the
County’s open space bond funds.

TMA expressed their gratitude to Supervisor Richard
Elias, Supervisor Sharon Bronson, Pima County
Administrator Chuck Huckelberry, Congressman Raul
Grijalva and Michael Patrick from the Trust for Public
Land, who have supported this effort for the past four
years. “Saving Sweetwater required a tremendous commit-
ment in grassroots volunteer efforts from the people of the
Tucson Mountains, including a major effort to get out the
vote in support of the May open space bond measure. The
best is yet to come as our children and grandchildren enjoy
this pristine land for years to come. We look forward to
working with Pima County Parks and Natural Resource
staff in the park planning process for Sweetwater,” said
Debbie Hecht, who along with Paula Chronister co-chaired
the Sweetwater Nature Preserve Committee.

The Sweetwater Preserve Committee wrote the
Sweetwater Report starting the process in June 2000. TMA
was advised during meetings with Supervisor Raul Grijalva
(who was District 5 Supervisor at the time) and Chuck

Huckelberry, Pima County Administrator to ask for help
from the Trust for Public Lands. TMA raised over $30,000,
which was used as part of the money to secure the option
on the property. TMA volunteers worked many hours with
the Friends of the Sonoran Desert to pass the 2004 Open
Space Bond.

Sweetwater Preserve is the largest remaining undevel-
oped property in the eastern portion of the Tucson
Mountains, located south of Camino del Cerro, north of
Sweetwater and west of Camino de Oeste, just three miles
outside of Tucson’s city limits. In addition to providing for
outstanding recreational uses by County residents, the
property provides habitat for a number of vanishing species,
for example the cactus ferruginous pygmy owl, desert tor-
toise, gila monster, lesser long nosed bat, grey fox, tiger rat-
tle snakes and mountain lions. It also contains many thou-
sands of young and mature saguaro cacti. Because of the
diverse geology of the Tucson Mountains and uneven dis-
tribution of plants and vegetative communities in this area,
the Sweetwater Preserve will provide additional protection
for the estimated 30% of the botanical diversity in the
Tucson Mountains that falls outside the boundaries of the
Saguaro National Park West.

The preserved area contains Sweetwater Wash, a major
watershed for the Tucson Mountains and a major wildlife
connector between the National Park and the Santa Cruz
River. Acquisition of the property has received endorse-
ments from over fifty organizations, including National
Park Service, U.S. Fish and Wildlife Service, the Arizona
Sonoran Desert Museum, Tucson Audubon Society, the
Coalition for the Sonoran Desert Protection, Arizona Open
Land Institute, The Nature Conservancy, Southern Arizona
Hiking Association, Pima Trails and the Sonoran Institute,
among others.

S W E E T W A T E R  N A T U R E  P R E S E R V E  
B E C O M E S  A  P I M A  C O U N T Y  P A R K

Celebration planned for October 17, 2004 at the Tortolita (north) side of the property
www.TucsonMountainsAssoc.org

Today, the Gila monster is celebrated for what he is: a unique, native Southwesterner whose infrequent appearances bestow a special

blessing on the land and brighten any day afield. The animal’s venomous nature is considered fascinating rather than sinister, and

his bizarre reputation is regarded more as charming regional folklore than the product of Gothic nightmares. As one of the most brilliantly

colored, yet least seen and understood inhabitants of the Sonoran Desert, the lizard has come to symbolize the desert’s beauty and mys-

tery. Let us hope the Gila monster will remain a source of such inspiration and be with us always.
— from Brown & Carmony, 1991

Gila Monster: Facts and Folklore of America’s Aztec Lizard



ing team members experienced in political activism who have
already established contacts). Many such meetings are required
to keep the project in constant view (politicians, especially, often
have short attention spans). Be certain that all public hearings
are well attended by knowledgeable and well-spoken persons
who support the project. Detractors must be out-voiced, and the
best way of achieving this is to present overwhelming quantities
of supportive evidence, which almost always wins over even the
most loudly voiced opinions.

Step 5: Persevere
Challenging those who would rather see wildlife habitat turned
into a resort or a housing project is never easy. Don’t assume vic-
tory until the papers are signed. The hurdles are numerous and
will sometimes seem insurmountable. However, with a well-
designed and effectively implemented strategy and perseverance,
grassroots conservation projects can succeed.

22 IGUANA  •  VOLUME 12, NUMBER 1  •  MARCH 2005 WIEWANDT

DESERT TORTOISE (Gopherus agassizii).—This charismatic reptile is especially vulnerable to habitat disturbance, illegal collecting, and disease. Alien
grasses that take root and spread from roadsides and housing developments foster desert fires. Fires injure and kill tortoises and degrade their habi-
tat. Because females mature slowly and produce few young, the loss of just one animal per year can be catastrophic to a declining population. In
Arizona, killing or collecting Desert Tortoises is illegal, but they are not federally protected at this time. Adults and juveniles are regularly seen
within the Sweetwater Preserve.

The Tucson Mountains support a surprising botanical

richness…. No other desert range of similar size has such

a large flora. One reason for the great richness is its topo-

graphical diversity ranging from the Santa Cruz River through

valley floors and bajadas, rocky slopes, deep canyons, and a

summit that is just above the desert in relict oak-grassland veg-

etation. The equal summer and winter rainy seasons con-

tribute further to the number of plants; numerous species

respond mainly to one or the other season. Lastly, because of

its position on the wet eastern edge of the Sonoran Desert

there are numerous elements coming in from the grasslands to

the east.
— Mark Dimmitt




