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 Confidencesort icon Primary Substrate Secondary Substrate
Yolo Winters Sewage East Yes 38.542100 -121.985400 Certain cattails (Typha spp.)
Stanislaus Willms Road Pond Yes 37.784800 -120.620000 Certain cattails (Typha spp.)
San Benito Frye Lane Yes 36.932300 -121.423200 Certain bulrush or tule (Schoenoplectus spp.) cattails (Typha spp.)
Tulare Deer Creek North Yes 35.943835 -119.405539 Certain mallow in triticale triticale
Yolo Yolo Bypass Wildlife Area Yes 38.564600 -121.621200 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Merced Yosemite Lake Yes 37.368000 -120.435000 Certain other (note in Comments)
Siskiyou Lower Klamath NWR-Unit 9A Yes 41.921250 -121.631090 Certain stinging nettle (Urtica dioica)
Merced Kelly Ranch Levee Yes 37.276800 -120.826800 Certain milk thistle (Silybum marianum)
Kern Hafenfeld Ranch - wetlands Yes 35.671590 -118.319358 Certain cattails (Typha spp.)
Kern Wind Wolves: Little Lobo Yes 34.949200 -119.215000 Certain willows (Salix spp.) stinging nettle (Urtica dioica)
Sutter East Levee Road at Riego Road Yes 38.750900 -121.494100 Certain cattails (Typha spp.)
Colusa Delevan T17.1 Yes 39.317100 -122.105400 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Sacramento Sheldon Road at Waterman Road #2 Yes 38.442060 -121.348200 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Jackson Hwy 1 mi E Latrobe Rd Yes 38.493163 -121.127992 Certain cattails (Typha spp.)
Sutter Highway 113 #2 Yes 38.929000 -121.684700 Certain
San Luis Obispo Cuesta College Yes 35.333500 -120.736900 Certain bulrush or tule (Schoenoplectus spp.)
Tuolumne Highway 49 near Sims Road and RR Crossing #1 Yes 37.896302 -120.449775 Certain Himalayan blackberry (Rubus armeniacus)
Yolo Conaway Ranch Berries Yes 38.646600 -121.689300 Certain Himalayan blackberry (Rubus armeniacus) willows (Salix spp.)
Riverside Lake Norconian Yes 33.922000 -117.573000 Certain bulrush or tule (Schoenoplectus spp.)
Merced Van Clief Road at 6th Avenue Yes 37.308060 -120.833860 Certain Himalayan blackberry (Rubus armeniacus) willows (Salix spp.)
San Luis Obispo Highway 58 Pond #2 Yes 35.369490 -120.082905 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Fresno Monteiro Brothers Dairy Yes 36.444900 -119.894600 Certain stinging nettle (Urtica dioica) wheat
Mariposa White Rock Road 13.4 miles from Old Highway Yes 37.306950 -120.112850 Certain milk thistle (Silybum marianum) cattails (Typha spp.)
Tulare Lake Success Yes 36.101000 -118.911700 Certain stinging nettle (Urtica dioica)
Sacramento Clay Station Rd and Momtoma Ln. Yes 38.405835 -121.173583 Certain cattails (Typha spp.)
Kern South Lake Road Yes 35.136800 -119.304200 Certain other (note in Comments) other (note in Comments)
San Joaquin Liberty Road at Sowles Road Yes 38.235200 -121.189100 Certain other (note in Comments)
San Benito Panoche Rd X Brown's Valley Rd Yes 36.708476 -121.243057 Certain wheat
Merced Edminster Road and Second Avenue Yes 37.334951 -120.896559 Certain Himalayan blackberry (Rubus armeniacus) milk thistle (Silybum marianum)
Kern California City Central Park Yes 35.127400 -117.945400 Certain cattails (Typha spp.)
Merced O'Neill Forebay WA #3 Yes 37.077490 -121.031280 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Bradshaw Christian Yes 38.456781 -121.343350 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Twin Cities Road Yes 38.348060 -121.148110 Certain Himalayan blackberry (Rubus armeniacus) wild rose
Sacramento Horseless Carriage and Bradshaw Yes 38.500363 -121.340840 Certain Himalayan blackberry (Rubus armeniacus)
Colusa East Park Reservoir Yes 39.312485 -122.489705 Certain cattails (Typha spp.)
Wasco Juniper Flat Marsh Yes 45.211000 -121.136500 Certain cattails (Typha spp.)
Sacramento Twin Cities Waste Water Treatment Yes 38.299070 -121.324100 Certain Himalayan blackberry (Rubus armeniacus)
San Luis Obispo Corbett Canyon Yes 35.197922 -120.602932 Certain bulrush or tule (Schoenoplectus spp.) willows (Salix spp.)
Merced Los Banos Wildlife Area 63C Yes 37.156180 -120.801970 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Merced East Le Grand Road 2 Yes 37.224230 -120.152700 Certain milk thistle (Silybum marianum)
Sonoma Sonoma Raceway 3 Yes 38.166400 -122.471000 Certain bulrush or tule (Schoenoplectus spp.)
Monterey Skyline Road Yes 36.610700 -121.729370 Certain stinging nettle (Urtica dioica) mustard (Brassica spp.)
Kings Utica Avenue Pond Yes 35.875990 -119.817040 Certain other (note in Comments)
Shasta Locust Road Yes 40.428400 -122.273510 Certain other (note in Comments)
El Dorado Farm House Yes 38.618357 -121.071817 Certain Himalayan blackberry (Rubus armeniacus)
Stanislaus Fulkerth Road at Vivian Road Yes 37.507400 -121.049200 Certain cattails (Typha spp.)
Kern Wind Wolves: Upper Echo Yes 34.947973 -119.182434 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Tulare Creighton Ranch Yes 36.069444 -119.452778 Certain other (note in Comments)
Mendocino Hopper's Corner, Potter Valley Yes 39.325521 -123.095675 Certain Himalayan blackberry (Rubus armeniacus)
Fresno Little Panoche Reservoir Yes 36.784300 -120.799600 Certain bull thistle (Cirsium vulgare)