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Noise and Light Pollution

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Artificial noise and light can disturb natural wildlife behavior and potentially reduce wildlife use of crossing structures built to facilitate their crossing over and under state highways and interstates. In this study, we examine the role of artificial noise and light from traffic in wildlife species presence, activity, and willingness to use crossing structures.This research is intended to inform design and construction of crossing structures to enhance wildlife connectivity.
Project Date: 
Tuesday, September 4, 2018
Project Status: 

Artificial noise and light can disturb natural wildlife behavior and potentially reduce wildlife use of crossing structures built to facilitate their crossing over and under state highways and interstates. In this study, we examine the role of artificial noise and light from traffic in wildlife species presence, activity, and willingness to use crossing structures.This research is intended to inform design and construction of crossing structures to enhance wildlife connectivity. 

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Observation Summary

This is a summary of animal observation across all locations and positions.

Animal Animal Write-in Image Count Animal Count
1 Human 2,881 3,442
2 Mule (or Black tailed) Deer 1,081 1,208
3 Human Researcher 876 1,160
4 Gray Fox 634 635
5 Bobcat 331 335
6 California Ground Squirrel 307 316
7 Coyote 294 299
8 Wild Turkey 255 625
9 Black-Tailed Jackrabbit 236 244
10 American Marten 223 244
11 Brush Rabbit 221 221
12 Desert Cottontail 147 152
13 Black Bear 137 137
14 Virginia Opossum 128 128
15 Band-Tailed Pigeon 117 188
16 Raccoon 99 119
17 American Crow 84 105
18 Mountain Lion 76 86
19 Mountain Cottontail 75 75
20 Eastern Fox Squirrel 57 57
21 Eastern Gray Squirrel 54 54
22 Striped Skunk 53 53
23 Allen's Chipmunk 53 54
24 Turkey Vulture 46 46
25 Western Gray Squirrel 31 35
26 American Robin 29 31
27 Yellow-Bellied Marmot 25 25
28 Steller's Jay 22 24
29 Black Phoebe 15 15
30 Western Scrub-Jay 14 14
31 Douglas' Squirrel 14 14
32 Cow 11 19
33 Domestic Dog 8 9
34 Hermit Thrush 8 8
35 Steller's Jay Bird 7 7
36 California Thrasher 6 6
37 California Quail 6 12
38 California Towhee 6 6
39 California Pocket Mouse 4 4
40 Brewer's Blackbird 4 4
41 Acorn Woodpecker 4 4
42 Mourning Dove 4 4
43 Yellow-Rumped Warbler 4 4
44 Black Rat Rattus sp. 3 3
45 Western Spotted Skunk 3 3
46 European Starling 3 4
47 Dark-Eyed Junco 3 3
48 Granite Spiny Lizard 2 2
49 Long-Tailed Weasel 2 2
50 White-Tailed Jackrabbit 2 2
51 Golden-Mantled Ground Squirrel 2 2
52 Blue Jay 2 2
53 Western Toad 1 1
54 Northern River Otter 1 1
55 Western Scrub-Jay Bird 1 1
56 Western Fence Lizard 1 1
57 Red-Tailed Hawk 1 1
58 Yellow-Pine Chipmunk 1 1
59 Great Horned Owl 1 1