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SR 50 Connectivity

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Project Date: 
Monday, March 9, 2015
Project Status: 

State Route 50 is a major east-west transportation corridor across the Sierra Nevada. This project examines successful animal movement through structures under SR50 that were intentionally built for wildlife, or that were built for some other reason (e.g., a river crossing).

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Embedded thumbnail for SR 50 Connectivity: Time-lapse video of images

Three months of still photos at wildlife crossing structure under California highway 50. This structure was built by Caltrans, District 3, to allow wildlife to safely pass under the highway. Thousands of animals have passed through the structure, reducing conflict with vehicles on the highway above.

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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 American Robin 1 1
2 Band-Tailed Pigeon 18 36
3 Black Bear 44 44
4 Black Phoebe 3 3
5 Black Rat 3 3
6 Black-Headed Grosbeak 1 1
7 Bobcat 10 10
8 Brewer's Blackbird 6 6
9 Brown-Headed Cowbird 1 1
10 Brush Rabbit 11 11
11 California Ground Squirrel 18 18
12 California Pocket Mouse 4 4
13 California Quail 4 5
14 Cedar Waxwing 1 1
15 Cooper's Hawk 3 3
16 Domestic Dog 15 15
17 Eastern Gray Squirrel 4 4
18 Golden-Crowned Sparrow 2 2
19 Gray Fox 234 237
20 House Finch 47 83
21 Human 78 90
22 Human Researcher 8 8
23 Lesser Goldfinch 3 4
24 Mountain Quail 1 1
25 Mourning Dove 569 1,160
26 Mule (or Black tailed) Deer See far end of underpass (changes in shadows) 2 3
27 Mule (or Black tailed) Deer 3,175 4,598
28 Northern Rough-Winged Swallow 1 1
29 Pine Siskin 3 3
30 Purple Finch 1 1
31 Raccoon 40 40
32 Red-Shouldered Hawk 1 1
33 Ringtail 1 1
34 Steller's Jay 81 84
35 Striped Skunk 14 14
36 Western Gray Squirrel 27 27
37 Western Scrub-Jay 1 1