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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Videos

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.

Project Map

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