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 |
|---|---|---|---|---|---|---|---|
| Kings | South Wilbur Flood Basin | Yes | 35.828500 | -119.626600 | Certain | cattails (Typha spp.) | |
| Merced | West Bear Creek Levee 1 | Yes | 37.256620 | -120.828890 | Certain | milk thistle (Silybum marianum) | |
| Alameda | Milpitas North | Yes | 37.497946 | -121.924467 | Certain | bull thistle (Cirsium vulgare) | mustard (Brassica spp.) |
| Santa Barbara | Cuyama Elementary School | No | 34.918701 | -119.611000 | Certain | cattails (Typha spp.) | wheat |
| Merced | Duck Slough #2 | Yes | 37.208810 | -120.664980 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| Fresno | Little Panoche WA | Yes | 36.773020 | -120.815060 | Certain | other (note in Comments) | |
| San Joaquin | Farmington Dam | No | 37.913900 | -120.940200 | Certain | other (note in Comments) | |
| Siskiyou | Tule Lake NWR- Headquarters | Yes | 41.939000 | -121.566000 | Certain | stinging nettle (Urtica dioica) | |
| Merced | Hollister Land and Cattle - 01 | Yes | 37.231222 | -120.923196 | Certain | cattails (Typha spp.) | willows (Salix spp.) |
| San Joaquin | Gilmore Road | No | 38.042610 | -120.992350 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| Los Angeles | Avenue F Dairy | Yes | 34.750600 | -117.963400 | Certain | wheat | |
| Yolo | County Road 25 Reservoir | Yes | 38.646000 | -121.694300 | Certain | Himalayan blackberry (Rubus armeniacus) | cattails (Typha spp.) |
| San Diego | Mesa Grande Rd X Ponchetti Rd (non colony) | No | 33.164101 | -116.735001 | Certain | bull thistle (Cirsium vulgare) | |
| Sacramento | Salas Road | No | 38.358400 | -121.291100 | Certain | other (note in Comments) | |
| Colusa | Delevan Blind 24 | No | 39.283200 | -122.094900 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| Placer | Gleason Ranch Sunset Blvd. West | Yes | 38.818311 | -121.407981 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| San Benito | Little Panoche Road at Yturriart Road | No | 36.617520 | -120.876380 | Certain | ||
| Butte | Western Triangle | Yes | 39.519400 | -121.709200 | Certain | Himalayan blackberry (Rubus armeniacus) | cattails (Typha spp.) |
| Calaveras | South Petersburgh Road | Yes | 38.188400 | -120.796700 | Certain | cattails (Typha spp.) | Himalayan blackberry (Rubus armeniacus) |
| Colusa | Four Mile Road | Yes | 39.382013 | -122.113552 | Certain | other (note in Comments) | |
| Merced | Gun Club Road #2 | Yes | 37.231300 | -120.940000 | Certain | cattails (Typha spp.) | |
| San Joaquin | Hansen Road | No | 37.761800 | -121.521200 | Certain | other (note in Comments) | |
| Stanislaus | Diamond S Ranch | No | 37.628100 | -120.617010 | Certain | ||
| Yuba | Best Slough | Yes | 39.026500 | -121.507400 | Certain | cattails (Typha spp.) | Himalayan blackberry (Rubus armeniacus) |
| Lassen | Leavitt Correctional Center | Yes | 40.398200 | -120.492200 | Certain | cattails (Typha spp.) | |
| Kern | Twisselman Road #2 | No | 35.732000 | -119.742300 | Certain | ||
| Kings | Avenal, Highway 33 | Yes | 35.971963 | -120.115156 | Certain | wheat | mustard (Brassica spp.) |
| Kern | North Belridge | Yes | 35.529300 | -119.801900 | Certain | other (note in Comments) | |
| San Benito | Lovers Lane | No | 36.947900 | -121.426800 | Certain | ||
| Merced | Arena Plains Unit-Merced NWR | No | Certain | bulrush or tule (Schoenoplectus spp.) | |||
| Mendocino | Eastside Road Potter Valley | Yes | 39.301816 | -123.095178 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| Calaveras | Rock Creek Road at Highway 4 | No | 37.988210 | -120.649850 | Certain | other (note in Comments) | |
| Yolo | Conaway Ranch Berries | Yes | 38.646600 | -121.689300 | Certain | Himalayan blackberry (Rubus armeniacus) | willows (Salix spp.) |
| Sacramento | Tavernor Road at Apricot Lane | Yes | 38.434500 | -121.191900 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| Fresno | Friant-Kern Canal #1 | Yes | 36.881700 | -119.600000 | Certain | other (note in Comments) | |
| Merced | Interstate 5 at Cottonwood Road Pond | No | 37.178390 | -121.061920 | Certain | cattails (Typha spp.) | bulrush or tule (Schoenoplectus spp.) |
| Los Angeles | Gorman Post Road #2 | No | 34.784090 | -118.812220 | Certain | cattails (Typha spp.) | willows (Salix spp.) |
| Los Angeles | Highland Avenue | No | 34.586600 | -118.170500 | Certain | ||
| Kern | Lake Isabella | Yes | 35.665100 | -118.347500 | Certain | cattails (Typha spp.) | stinging nettle (Urtica dioica) |
| Riverside | Sycamore Canyon | Yes | 33.942500 | -117.322500 | Certain | milk thistle (Silybum marianum) | |
| Glenn | Afton | Yes | 39.419000 | -121.967000 | Uncertain | bulrush or tule (Schoenoplectus spp.) | |
| Sutter | Meridian #2 | Yes | 39.142300 | -121.916900 | Uncertain | cattails (Typha spp.) | |
| Sonoma | Southwest Sonoma County | Yes | 38.370000 | -122.990000 | Uncertain | other (note in Comments) | |
| Merced | South of Merced | Yes | 37.079000 | -120.476000 | Uncertain | cattails (Typha spp.) | |
| Butte | West Gridley #2 | Yes | 39.363000 | -121.865000 | Uncertain | cattails (Typha spp.) | |
| Yolo | Woodland Sugar Ponds | Yes | 38.704000 | -121.720000 | Uncertain | milk thistle (Silybum marianum) | |
| Colusa | East Delevan | Yes | 39.353400 | -122.115800 | Uncertain | cattails (Typha spp.) | |
| Contra Costa | Southwest Byron | Yes | 37.857700 | -121.651500 | Uncertain | bull thistle (Cirsium vulgare) | |
| Merced | Southeast Stevinson | Yes | 37.313600 | -120.835200 | Uncertain | milk thistle (Silybum marianum) | bull thistle (Cirsium vulgare) |
| San Diego | East Chula Vista | Yes | 32.698622 | -116.981049 | Uncertain | cattails (Typha spp.) |
