Colony Locations (Public)

This table contains publicly-accessible records of locations of tricolored blackbird colonies and aggregations. These may have occurred on either public or private property.

If you have not obtained rights of access to locations on private property, please view colonies from public (e.g., county) roads.

Fields provided are county, accepted name of location, whether the location is a known colony location, geographic coordinates, the confidence in the location coordinates, and the primary and secondary substrates types (the types of vegetation present).

Download Data: Excel Spreadsheet (.xls), Comma Separated Values (.csv)

County Name Colony Latitude Longitude Location Confidence Primary Substrate Secondary Substrate
Colusa Husted Road Yes 39.181910 -122.131090 Certain cattails (Typha spp.)
Colusa Husted Road at Highway 20 Yes 39.174000 -122.132000 Certain cattails (Typha spp.)
San Benito HWY 25 at Lewis Creek-North Yes 36.301511 -120.930204 Certain mallow (Malva sp.)
Monterey HWY 25 at Lewis Creek-South Yes 36.300925 -120.929582 Certain mallow (Malva sp.)
San Luis Obispo Hwy 33 Cuyama Valley Yes 34.918751 -119.513054 Certain cattails (Typha spp.) willows (Salix spp.)
Calaveras Hwy 49 A Cosgrave Rd #2 Yes 38.109482 -120.599284 Certain Himalayan blackberry (Rubus armeniacus) cattails (Typha spp.)
San Diego Hwy 79 Call Box 79-231 Santa Ynez Valley Yes 33.147400 -116.676000 Certain Himalayan blackberry (Rubus armeniacus) stinging nettle (Urtica dioica)
Yuba Hwy. 20 and Woodruff Lane Yes 39.208442 -121.519623 Certain Himalayan blackberry (Rubus armeniacus)
San Diego Hwy. 79, Warner Springs South Yes 33.252065 -116.671995 Certain bulrush or tule (Schoenoplectus spp.) other (note in Comments)
Tehama I-5 and Draper Rd. (Exit 662) Yes 40.370758 -122.286595 Certain Himalayan blackberry (Rubus armeniacus)
Merced I-5 North ROW Yes 37.184500 -121.067100 Certain milk thistle (Silybum marianum)
Amador Indian Creek Yes 38.483200 -120.922250 Certain Himalayan blackberry (Rubus armeniacus)
Placer Industrial Avenue Yes 38.861280 -121.313280 Certain bulrush or tule (Schoenoplectus spp.) cattails (Typha spp.)
Merced Interstate 5 at Cottonwood Road Yes 37.187790 -121.073640 Certain mustard (Brassica spp.) other (note in Comments)
Merced Interstate 5 at Highway 140 Yes 37.241800 -121.085300 Certain bulrush or tule (Schoenoplectus spp.)
Kern Interstate 5 at Kings County Line Yes 35.786140 -119.780450 Certain cattails (Typha spp.)
Stanislaus Interstate 5 at Patterson Yes 37.438500 -121.161000 Certain bulrush or tule (Schoenoplectus spp.)
Orange Interstate 5 at Sand Canyon Avenue Yes 33.676890 -117.764780 Certain milk thistle (Silybum marianum)
Sacramento Iron Point Road Yes 38.646300 -121.104400 Certain Himalayan blackberry (Rubus armeniacus)
Riverside Jackrabbit Trail Yes 33.893700 -117.070300 Certain cattails (Typha spp.)
Sacramento Jackson and Bradshaw Yes 38.530987 -121.338308 Certain cattails (Typha spp.)
Sacramento Jackson Hwy - Aspen IV washwater ponds Yes 38.530729 -121.339322 Certain cattails (Typha spp.)
Sacramento Jackson Hwy 1 mi E Latrobe Rd Yes 38.493163 -121.127992 Certain cattails (Typha spp.)
Sacramento Jackson Hwy Pond 0.8 mi W Stonehouse Rd Yes 38.496134 -121.116763 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Jackson Hwy Quarry Yes 38.507882 -121.254054 Certain milk thistle (Silybum marianum)
San Diego Jacumba Yes 32.618314 -116.192493 Certain cattails (Typha spp.)
Solano Jehovah's Witness Pond Yes 38.267668 -121.983969 Certain cattails (Typha spp.)
Stanislaus Jennings Road Yes 37.538000 -121.066000 Uncertain other (note in Comments)
Solano Jepson Prairie Preserve Yes 38.277000 -121.823000 Certain other (note in Comments)
Shasta Jim Day Road Yes 41.042900 -121.387700 Certain Himalayan blackberry (Rubus armeniacus)
San Benito John Smith Rd- Floor of Santa Ana Valley Yes 36.823989 -121.300006 Certain milk thistle (Silybum marianum)
Mendocino Johnson Pond Yes 38.964123 -123.134305 Certain bulrush or tule (Schoenoplectus spp.) cattails (Typha spp.)
Lassen Johnstonville Yes 40.379340 -120.555370 Certain cattails (Typha spp.)
Napa Juliana Vineyard Pond #2 Yes 38.655900 -122.396700 Certain cattails (Typha spp.)
Wasco Juniper Flat Marsh Yes 45.211000 -121.136500 Certain cattails (Typha spp.)
San Bernardino Jurupa Street Yes 34.043800 -117.542200 Certain cattails (Typha spp.)
Alameda Kaiser Gravel Company Yes 37.676484 -121.829538 Certain cattails (Typha spp.)
Kings Kansas Avenue Yes 36.212000 -119.547900 Certain other (note in Comments)
Merced Keaton and 4th Yes 37.323210 -120.910930 Certain Himalayan blackberry (Rubus armeniacus)
Merced Kelly Ranch Levee Yes 37.276800 -120.826800 Certain milk thistle (Silybum marianum)
Merced Kelsey Reservoir - Kelsey Ranch Yes 37.538290 -120.353487 Certain milk thistle (Silybum marianum)
Kern Kelso Valley - Ranch Ponds Yes 35.371781 -118.218153 Certain cattails (Typha spp.)
Kern Kern Lake Preserve Yes 35.111100 -119.052900 Certain cattails (Typha spp.)
Kern Kern NWR Fowler Canal Yes 35.775500 -119.611700 Certain bull thistle (Cirsium vulgare)
Kern Kern NWR Unit 1 Yes 35.727100 -119.598200 Certain
Kern Kern NWR- Highway 155 Yes 35.759530 -119.582550 Certain cattails (Typha spp.)
Kern Kern NWR- Tour Route #1 Yes 35.741100 -119.585000 Certain cattails (Typha spp.)
Kern Kern NWR- Tour Route #2 Yes 35.733600 -119.584800 Certain cattails (Typha spp.)
Kern Kern River Bike Path No. 1 Yes 35.316400 -119.223000 Certain stinging nettle (Urtica dioica)
Kern Kern River Bridge/I-5 Yes 35.300600 -119.270200 Certain stinging nettle (Urtica dioica) other (note in Comments)
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