WSP12637

• File Number: 8282.300
• Description: Colorado River Operations and Accounting - Lower Basin Administrative Procedures
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 8/1/1996
• Author: DOI-BOR
• Title: Description and Assessment of Operations-Maintenance and Sensitive Species of the Lower Colorado River - Volume I - Report - 08-01-96
• Water Supply Pro - Doc Type: Report/Study

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

/-.....3
,,' \", "
u ~ &.i ) .t

IV. SPECIES ............................................. 120

A. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

B. Terrestrial'....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

1. Endangered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

a. Peregrine Falcon ............................ 120
b. Southwestern Willow Flycatcher. . . . . . . . . . . . . . . . . . . 122

2. Threatened .................................... 128

fl. Bald Eagle .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

b. Desert Tortoise ............................. 133
3. Proposed Threatened .............................. 137
Flat-tailed homed lizard .......................... 137

4. Sensitive...................................... 140

a. California Leaf-Nosed Bat. . . . . . . . . . . . . . . . . . . . . . . 140

b. Spotted Bat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

c. Greater Western Mastiff-Bat ..................... 141
d. Small-Footed Myotis . . . . . . . . . . . . . . . . . . . . . . . . . . 142
e. Allen's (Mexican) Big-Eared Bat. . . . . . . . . . . . . . . . . . . 142
,f. Pale Townsend's Big-Eared Bat . . . . .. . . . . . . . . . . . . . . 142
g. Long-Legged Myotis . . . . . . . . . . . . . . . . . . . . . . . . . . 143
h. Fringed Myotis ............................. 143
I. Yuma Myotis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
j. Cave Myotis ............................... 144
k. Yuma Hispid Cotton Rat ....................... 145
1. Loggerhead Shrike ........................... 145
1m. Large-billed Savannah Sparrow ................... 146
n. Arizona Toad .............................. 147
o. Desert tortoise (Sonoran population) ................ 148

p. Rosy Boa . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

iq. Cowles's fringe-toed lizard ...................... 149
:r. Chuckwalla................................ 150
s. Grand Wash Springsnail . . . . . . . . . . . . . . . . . . . . . . . . 151
t. White Desertsnail ............................ 151
u. Cheeseweed owlfly . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
v. MacNeill's sootywing ......................... 155

w. Dune sunflower .. . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

x. Sand food ................................ 157

y. Foxtail cactus .............................. 158
z. Crissal Thrasher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

C. Marsh ........................................... 160

1. Endangered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

'a. Brown Pelican . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

b. Yuma Clapper Rail . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

2. Sensitive...................................... 168

111