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 |
|---|---|---|---|---|---|---|---|
| Glenn | Road VV at Road 34 | No | 39.616900 | -122.053400 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| Colusa | Delevan T17.1 | Yes | 39.317100 | -122.105400 | Certain | cattails (Typha spp.) | bulrush or tule (Schoenoplectus spp.) |
| Calaveras | Rock Creek Road at Highway 4 | No | 37.988210 | -120.649850 | Certain | other (note in Comments) | |
| Lake | Highland Springs Road | Yes | 38.960787 | -122.897242 | Certain | cattails (Typha spp.) | |
| Orange | Sand Canyon Reservoir | Yes | 33.644000 | -117.795000 | Certain | milk thistle (Silybum marianum) | |
| Los Angeles | Una Lake/Barrel Springs Wetlands | No | 34.550221 | -118.111911 | Certain | willows (Salix spp.) | bulrush or tule (Schoenoplectus spp.) |
| Sacramento | Stonehouse Road | Yes | 38.503000 | -121.103000 | 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 | Highland Avenue | No | 34.586600 | -118.170500 | Certain | ||
| Contra Costa | Byron Airport | No | 37.830463 | -121.632257 | Certain | bulrush or tule (Schoenoplectus spp.) | willows (Salix spp.) |
| Riverside | Sycamore Canyon | Yes | 33.942500 | -117.322500 | Certain | milk thistle (Silybum marianum) | |
| Shasta | Clover Creek Preserve | No | 40.551399 | -122.315002 | Certain | ||
| Yuba | Dairy Road | No | 39.020926 | -121.464608 | Certain | other (note in Comments) | |
| Tulare | Homeland Canal and Avenue 120 | No | 36.006201 | -119.467049 | Certain | ||
| Merced | Highway 165 at 6th Avenue #2 | No | 37.300300 | -120.851600 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| Colusa | Highway 99 at Maxwell | Yes | 39.290784 | -122.190714 | Certain | bulrush or tule (Schoenoplectus spp.) | willows (Salix spp.) |
| Merced | Los Banos Wildlife Area 57 | No | 37.135320 | -120.770480 | Certain | cattails (Typha spp.) | bulrush or tule (Schoenoplectus spp.) |
| Sacramento | Twin Cities Road at McKenzie Road | No | 38.294200 | -121.296200 | Certain | ||
| Kern | Bob Powers Gateway Preserve | Yes | 35.625871 | -118.478022 | Certain | stinging nettle (Urtica dioica) | |
| San Benito | San Felipe Lake | No | 36.977800 | -121.459500 | Certain | other (note in Comments) | |
| San Diego | Dye Road #2 | No | 33.007900 | -116.870100 | Certain | ||
| Santa Cruz | Greyhound Rock Pond | Yes | 37.087800 | -122.259100 | Certain | cattails (Typha spp.) | bulrush or tule (Schoenoplectus spp.) |
| Santa Barbara | Sedgwick Reserve | Yes | 34.695230 | -120.041660 | Certain | cattails (Typha spp.) | bulrush or tule (Schoenoplectus spp.) |
| Fresno | Little Panoche Reservoir-South | Yes | 36.779710 | -120.799100 | Certain | cattails (Typha spp.) | willows (Salix spp.) |
| Merced | Arena Plains Unit, Merced NWR - Bear Creek | Yes | 37.254312 | -120.714684 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| San Luis Obispo | Pennington Creek Road III | Yes | 35.341830 | -120.740840 | Certain | other (note in Comments) | |
| Merced | Santa Fe Grade at Gun Club Road #3 | Yes | 37.199700 | -120.926400 | Certain | bull thistle (Cirsium vulgare) | |
| Colusa | Acre Farms Willows | Yes | 39.224750 | -122.099650 | Certain | cattails (Typha spp.) | willows (Salix spp.) |
| Sacramento | Calvine Road at Bradshaw Road | Yes | 38.456400 | -121.339400 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| Merced | 4th Ave past Rosa Rd. | Yes | 37.320663 | -120.873942 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| Sacramento | Sheldon Road at Bradshaw Road | No | 38.437400 | -121.335200 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| Stanislaus | Simon Newman Ranch | Yes | 37.327069 | -121.190363 | Certain | milk thistle (Silybum marianum) | |
| San Benito | Tres Pinos Creek | Yes | 36.789540 | -121.327460 | Certain | cattails (Typha spp.) | |
| Kern | Rancho de Nada | Yes | 35.310800 | -117.920100 | Certain | cattails (Typha spp.) | |
| Kern | Kern River Parkway | Yes | 35.329900 | -119.189600 | Certain | ||
| Monterey | Pancho Rico Creek | Yes | 36.049000 | -120.815600 | Certain | other (note in Comments) | |
| Kern | Tehachapi #5 - Equestrian Center | No | 34.164200 | -118.609001 | Certain | other (note in Comments) | |
| Merced | O'Neill Forebay (non-colony) | No | 37.082000 | -121.023200 | Certain | ||
| Kern | Tule Elk Preserve Middle Pond | Yes | 35.319200 | -119.359000 | Certain | cattails (Typha spp.) | stinging nettle (Urtica dioica) |
| Tehama | Interstate 5 at Red Bluff | No | 40.140070 | -122.220580 | Certain | cattails (Typha spp.) | |
| Yolo | Yolo Bypass II | Yes | 38.427011 | -121.609090 | Certain | mustard (Brassica spp.) | milk thistle (Silybum marianum) |
| Orange | Peter's Canyon Reservoir | Yes | 33.782300 | -117.760900 | Certain | cattails (Typha spp.) | bulrush or tule (Schoenoplectus spp.) |
| Merced | Duck Slough #2 | Yes | 37.208810 | -120.664980 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| San Joaquin | Farmington Dam | No | 37.913900 | -120.940200 | Certain | other (note in Comments) | |
| Yolo | Sacramento River Levee Road 2 | Yes | 38.427010 | -121.609090 | Certain | mustard (Brassica spp.) | |
| San Joaquin | Gilmore Road | No | 38.042610 | -120.992350 | Certain | Himalayan blackberry (Rubus armeniacus) | |
| Riverside | Winchester Slough | Yes | 33.601931 | -117.117391 | Certain | cattails (Typha spp.) | |
| San Joaquin | Via Nicolo Road | Yes | 37.714840 | -121.534390 | Certain | milk thistle (Silybum marianum) | |
| Yolo | County Road 25 Reservoir | Yes | 38.646000 | -121.694300 | Certain | Himalayan blackberry (Rubus armeniacus) | cattails (Typha spp.) |
| Riverside | Perris Airport | Yes | 33.753300 | -117.217200 | Certain | mustard (Brassica spp.) | milk thistle (Silybum marianum) |
