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