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
Riverside San Jacinto WA: North of Horse Ranch Yes 33.891800 -117.126000 Certain mallow (Malva sp.)
Tulare Pacheco Dairy Yes 36.256111 -119.447770 Certain triticale mallow (Malva sp.)
Sacramento Arkansas Creek Dam: North Yes 38.470020 -121.060000 Certain willows (Salix spp.)
Sacramento Rancho Seco Vineyard Yes 38.339094 -121.144363 Certain Himalayan blackberry (Rubus armeniacus)
Kings Naval Air Station Lemoore II Yes 36.260565 -119.908390 Certain cattails (Typha spp.)
Ventura Lake Sherwood Yes 34.137500 -118.861100 Certain cattails (Typha spp.) willows (Salix spp.)
Tulare Dry Creek Quarry Yes 36.431434 -119.024162 Certain bulrush or tule (Schoenoplectus spp.)
San Bernardino Newberry Springs Black Butte Road Yes 34.859027 -116.677536 Certain cattails (Typha spp.)
Merced Merced NWR: West Farmfield Yes 37.177500 -120.634000 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Santa Barbara Sedgwick Reserve Yes 34.695230 -120.041660 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Sacramento Stonehouse Road Yes 38.503000 -121.103000 Certain other (note in Comments)
Kern Bitter Creek N.W.R. - Azbul Trough Yes 34.935631 -119.354643 Certain bull thistle (Cirsium vulgare)
Sacramento Koessler Dairy Yes 38.280510 -121.311060 Certain Himalayan blackberry (Rubus armeniacus)
Tulare Rocky Hill Drive Yes 36.298300 -119.067100 Certain bulrush or tule (Schoenoplectus spp.) cattails (Typha spp.)
Colusa Wescott Road Yes 39.152070 -122.022200 Certain cattails (Typha spp.)
San Luis Obispo Pennington Creek Road I Yes 35.351900 -120.719100 Certain bulrush or tule (Schoenoplectus spp.)
Stanislaus Willms Ranch House Yes 37.801590 -120.646480 Certain Himalayan blackberry (Rubus armeniacus) willows (Salix spp.)
Kern Kern Water Bank M7-1 Yes 35.309400 -119.280000 Certain stinging nettle (Urtica dioica) mesquite (Prosopis spp.)
Placer Little Ben Yes 38.956172 -121.256855 Certain Himalayan blackberry (Rubus armeniacus)
San Bernardino Jurupa Street Yes 34.043800 -117.542200 Certain cattails (Typha spp.)
Merced Los Banos Wildlife Area 42 Yes 37.100690 -120.800000 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Napa Anselmo Court Marsh Yes 38.246530 -122.280200 Certain cattails (Typha spp.)
Butte Thermalito Afterbay near Toland Road Yes 39.508654 -121.683476 Certain willows (Salix spp.) wild rose
San Diego Dameron Valley Yes 33.421800 -116.829100 Certain
Merced Gun Club Road #2 Yes 37.231300 -120.940000 Certain cattails (Typha spp.)
Sacramento Elder Creek at Bradshaw Road Yes 38.504930 -121.341170 Certain Himalayan blackberry (Rubus armeniacus) wild rose
Yolo County Road 92B Yes 38.764580 -121.924030 Certain Himalayan blackberry (Rubus armeniacus)
Los Angeles Landfill/Aqueduct Site 2 Yes 34.571203 -118.168250 Certain cattails (Typha spp.)
Colusa Delevan T45.1 Yes 39.305300 -122.182300 Certain bulrush or tule (Schoenoplectus spp.) cattails (Typha spp.)
Alameda Altamont Creek Yes 37.660042 -121.808553 Certain cattails (Typha spp.)
Madera Avenue 7 at Road 16 Yes 36.850900 -120.237100 Certain bulrush or tule (Schoenoplectus spp.)
Kern Rio Bravo Country Club Yes 35.408200 -118.842100 Certain
Colusa Four Mile Road Yes 39.382013 -122.113552 Certain other (note in Comments)
Merced Merced NWR: East Farmfield 5 Yes 37.174290 -120.603280 Certain mustard (Brassica spp.) milk thistle (Silybum marianum)
Riverside Lake Hemet Yes 33.667559 -116.669902 Certain bulrush or tule (Schoenoplectus spp.)
Merced Merced NWR: Chamberlain Road North Yes 37.158618 -120.618336 Certain milk thistle (Silybum marianum)
Merced Main Canal Yes 36.949920 -120.785210 Certain bulrush or tule (Schoenoplectus spp.)
Kings Racine Avenue at Kettleman City Yes 36.007280 -119.923120 Certain cattails (Typha spp.)
Sacramento West of Sunrise Yes 38.497800 -121.243000 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Elder Creek 4 Yes 38.511601 -121.309946 Certain Himalayan blackberry (Rubus armeniacus) other (note in Comments)
Merced Gun Club Road #3 Yes 37.231222 -120.923196 Certain cattails (Typha spp.) willows (Salix spp.)
Riverside San Jacinto WA: Marsh A Yes 33.872600 -117.116500 Certain cattails (Typha spp.) willows (Salix spp.)
Los Angeles Chatsworth Reservoir Yes 34.235800 -118.629600 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Yuba Erle Road-Reeds Creek North Yes 39.107284 -121.507931 Certain lettuce (Lactuca spp.) Himalayan blackberry (Rubus armeniacus)
Kern Kern NWR Fowler Canal Yes 35.775500 -119.611700 Certain bull thistle (Cirsium vulgare)
Merced McNamara Road Yes 37.228960 -120.453640 Certain milk thistle (Silybum marianum)
Sacramento Highway 104 at Clay Yes 38.340300 -121.155000 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Folsom South Canal End Yes 38.309610 -121.187590 Certain Himalayan blackberry (Rubus armeniacus)
Orange Laguna Niguel Regional Park-Central Island Yes 33.546420 -117.704740 Certain cattails (Typha spp.) Giant reed (Arundo donax)
Sacramento Jackson Hwy - Aspen IV washwater ponds Yes 38.530729 -121.339322 Certain cattails (Typha spp.)
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