TRACKS

[Illustration: COYOTE

2¼ in.]

[Illustration: KANGAROO RAT

¼ in.]

[Illustration: BEETLE

¼ in.]

[Illustration: RAVEN

3½ in.]

[Illustration: KIT FOX

1¾ × 1⅞ in.]

[Illustration: LIZARD

2 to 3 in.]

[Illustration: SIDEWINDER

4 in.]

[Illustration: JACKRABBIT]

Jackrabbits are not seen often in the dunes, although their tracks and

droppings are seen occasionally. They feed on plants, getting moisture

from their food rather than from distant springs. Large ears radiate

excess body heat and help cool the animal as it rests in shaded areas

during the hot day.

Have you seen any birds? Birds also leave tracks! The large bird tracks

here are generally left by ravens—big, black birds which eat almost

anything. In the spring and fall, some migrating birds stop briefly.

Shrikes, sparrows, kingbirds and blackbirds are among the visitors and

residents of the dunes. Insects and vegetation provide food and shelter

for them.

[Illustration: BEETLE]

Have you seen any insects? Tracks resembling those of a tiny bulldozer

tell us where beetles have traveled. Shiny black circus beetles or

stinkbugs and gray snout beetles are often seen.

Since most activity in the dunes takes place at night, very little of

this action is observed. However, in the morning we can stroll in the

sand and unravel the secrets of the previous night. As you look at each

set of tracks, imagine what the animal looks like as it moves. How big

is it? How many feet does it have? Are the feet side by side as though

jumping like rodents or rabbits, or do they alternate as in the walking

or running motion of lizards? How far apart are the prints? Does the

animal drag its tail? Now, where do the tracks go? Follow some animal

tracks to see what interactions have taken place. The same animal may

leave different tracks on different sand surfaces or under difference

circumstances. Notice your own tracks as you walk, run, jump or sit in

loose or firm sand. Try it!

_In many respects these dunes are like any Other deposits of windblown

sand along the coast or in deserts. They reflect variations in the sand

supply and respond to particular wind patterns following the same basic,

natural principles. Several other National Parks and Monuments have sand

dunes of various sizes and composition. Death Valley dunes are not the

largest in the United States by any means! Here the dunes reach a height

of 80 ft. (24 m). They provide a visual change of pace with their soft

lines and shadows in contrast to the sharp, rugged mountain peaks around

them._

Sand

soft

fine

Easy to sift and mold.

Once a solid block of rock now weathered very old.

Blown by winds into dunes and features.

Forming a hot dry home for desert creatures.

Patterns of shadow and shade by tree and sand dune made.

Walk

touch

explore

Enjoy the dunes and come back once more.

Donna Paul Bessken

[Illustration: {Dunes}]

We hope you have enjoyed this walking tour. As you continue to explore

Death Valley National Monument, contact any National Park Service

employee if you need information or assistance.

[Illustration: NATIONAL PARK SERVICE]

U. S. DEPARTMENT OF THE INTERIOR

National Park Service

As the Nation’s principal conservation agency, the Department of the

Interior has basic responsibilities for water, fish, wildlife, mineral,

land, park and recreational resources. Indian and territorial affairs

are other major concerns of America’s “Department of Natural Resources.”

The Department works to assure the wisest choice in managing all our

resources so each will make its full contribution to a better United

States—now and in the future.

[Illustration: Death Valley Natural History Association]

The Death Valley Natural History Association is a non-profit

organization pledged to aid in the preservation and interpretation of

the outstanding features of Death Valley National Monument.

FOR INFORMATION AND MEMBERSHIP CONTACT

Death Valley

Natural History Association

P.O. Box 188

Death Valley, California 92328

CREDITS:

TEXT: DONNA P. BESSKEN

PHOTOGRAPHY: T. FORBES OSBORN

EDITED BY: VIRGIL J. OLSON

DRAWINGS: SYLVIA STOSSER

DESIGN AND GRAPHICS:

RUSS JOHNSON

GEORGIA SUMMERS

Chalfant Press

[Illustration: {wraparound cover illustration}]

Sand dunes story · 第 9 / 10 题