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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 Image Count Animal Count
1 Western Scrub-Jay 1 1
2 Black-Headed Grosbeak 1 1
3 Ringtail 1 1
4 American Robin 1 1
5 Mountain Quail 1 1
6 Cedar Waxwing 1 1
7 Purple Finch 1 1
8 Northern Rough-Winged Swallow 1 1
9 Red-Shouldered Hawk 1 1
10 Brown-Headed Cowbird 1 1
11 Golden-Crowned Sparrow 2 2
12 Black Phoebe 3 3
13 Cooper's Hawk 3 3
14 Black Rat 3 3
15 Pine Siskin 3 3
16 Lesser Goldfinch 3 4
17 California Pocket Mouse 4 4
18 Eastern Gray Squirrel 4 4
19 California Quail 4 5
20 Brewer's Blackbird 6 6
21 Human Researcher 8 8
22 Bobcat 10 10
23 Brush Rabbit 11 11
24 Striped Skunk 14 14
25 Domestic Dog 15 15
26 California Ground Squirrel 18 18
27 Band-Tailed Pigeon 18 36
28 Western Gray Squirrel 27 27
29 Raccoon 40 40
30 Black Bear 44 44
31 House Finch 47 83
32 Human 78 90
33 Steller's Jay 81 84
34 Gray Fox 234 237
35 Mourning Dove 569 1,160
36 Mule (or Black tailed) Deer 3,177 4,601