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
Kern Bob Powers Gateway Preserve Yes 35.625871 -118.478022 Certain stinging nettle (Urtica dioica)
Kings Utica Avenue at Interstate 5 Yes 35.884000 -119.853400 Certain lettuce (Lactuca spp.)
Sacramento Bradshaw Christian Yes 38.456781 -121.343350 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Simmerhorn Road Yes 38.263700 -121.198400 Certain other (note in Comments)
San Benito Panoche Creek Yes 36.591250 -120.771020 Certain cattails (Typha spp.)
Butte Humboldt Road Dump Yes 39.739510 -121.787267 Certain bull thistle (Cirsium vulgare)
Placer Rodeo Ground Open Space 1 Yes 38.862735 -121.286874 Certain Himalayan blackberry (Rubus armeniacus) cattails (Typha spp.)
Kern Bitter Creek NWR: Red Lake Nettles Yes 34.936639 -119.425260 Certain stinging nettle (Urtica dioica) other (note in Comments)
Merced O'Neill Forebay WA #1 Yes 37.083308 -121.027710 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Morrison Creek Yes 38.523800 -121.334600 Certain Himalayan blackberry (Rubus armeniacus)
Fresno Big Dry Creek Reservoir Yes 36.873100 -119.648000 Certain stinging nettle (Urtica dioica) milk thistle (Silybum marianum)
Alameda Alameda Creek Yes 37.578600 -121.877800 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Crook LaMonta Marsh Yes 44.369700 -120.886300 Certain cattails (Typha spp.)
Sacramento Laguna Creek at Franklin Boulevard Yes 38.441890 -121.435620 Certain Himalayan blackberry (Rubus armeniacus)
Colusa Lurline Road Yes 39.218124 -122.062740 Certain other (note in Comments)
San Diego Whelan Lake Yes 33.244400 -117.337700 Certain cattails (Typha spp.)
Glenn Road P No. 2 Yes 39.505196 -122.136401 Certain Himalayan blackberry (Rubus armeniacus)
El Dorado Salmon Falls Road Yes 38.790800 -121.018500 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento McKenzie Road at Mingo Road Yes 38.298000 -121.301000 Certain Himalayan blackberry (Rubus armeniacus)
Sonoma Sonoma Raceway 1 Yes 38.167200 -122.474000 Certain bulrush or tule (Schoenoplectus spp.)
Humboldt Highway 101 at Drake Hill Road #1 Yes 40.559380 -124.146530 Certain Himalayan blackberry (Rubus armeniacus)
San Luis Obispo River Road #2 Yes 35.739600 -120.685600 Certain cattails (Typha spp.)
El Dorado Carson Creek Bridge Yes 38.625730 -121.066090 Certain Himalayan blackberry (Rubus armeniacus) willows (Salix spp.)
Stanislaus Interstate 5 at Patterson Yes 37.438500 -121.161000 Certain bulrush or tule (Schoenoplectus spp.)
Solano McCoy Basin Yes 38.285185 -121.991073 Certain bull thistle (Cirsium vulgare) lettuce (Lactuca spp.)
Merced Los Banos Wildlife Area 63A Yes 37.161200 -120.799500 Certain cattails (Typha spp.)
Calaveras Pond at Campo Seco and Waterton Rds Yes 38.229391 -120.837615 Certain cattails (Typha spp.)
Sacramento Cherokee Lane Yes 38.286300 -121.265227 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Florin Rd County WTP Yes 38.499043 -121.312580 Certain cattails (Typha spp.)
Kern Wind Wolves: Echo Flat Yes 34.957400 -119.132000 Certain willows (Salix spp.) stinging nettle (Urtica dioica)
Merced Hulen Levee Yes 37.144200 -120.993700 Certain Himalayan blackberry (Rubus armeniacus) milk thistle (Silybum marianum)
Merced Orchard Road at Highway 140 Yes 37.251200 -121.071300 Certain cattails (Typha spp.)
Siskiyou Lower Klamath NWR-Unit 8B Southwest Yes 41.938540 -121.676580 Certain stinging nettle (Urtica dioica)
Lassen Johnstonville Yes 40.379340 -120.555370 Certain cattails (Typha spp.)
Calaveras Highway 49 near Cosgrave Rd Yes 38.111701 -120.594073 Certain Himalayan blackberry (Rubus armeniacus)
Madera Bates Station Road Yes 37.077510 -119.864170 Certain milk thistle (Silybum marianum)
Sacramento Excelsior at Elder Creek Yes 38.514910 -121.302800 Certain Himalayan blackberry (Rubus armeniacus)
Kern Kern Water Bank No. 8 Yes 35.305000 -119.278330 Certain mesquite (Prosopis spp.) stinging nettle (Urtica dioica)
San Luis Obispo Highway 58 Pond #2 Yes 35.369490 -120.082905 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
San Luis Obispo Feenstra Road Yes 35.570700 -120.569600 Certain cattails (Typha spp.)
Santa Barbara Goleta Slough Yes 34.416900 -119.840300 Certain other (note in Comments)
San Diego Ramona Pond #2 West of Magnolia Yes 33.060550 -116.845050 Certain cattails (Typha spp.)
Solano Hay Road Landfill Yes 38.306500 -121.825400 Certain cattails (Typha spp.)
San Luis Obispo Cuyama River Yes 35.067370 -119.989610 Certain cattails (Typha spp.)
Sacramento Boessow Road Yes 38.255910 -121.215250 Certain Himalayan blackberry (Rubus armeniacus) milk thistle (Silybum marianum)
Butte Little Dry Creek #2 Yes 39.388100 -121.888100 Certain willows (Salix spp.) cattails (Typha spp.)
Placer Orchard Creek Yes 38.847851 -121.306604 Certain Himalayan blackberry (Rubus armeniacus)
Calaveras Hunt Road #3 Yes 38.042140 -120.840470 Certain Himalayan blackberry (Rubus armeniacus)
Monterey Hebert Road Pond Yes 36.763200 -121.619400 Certain cattails (Typha spp.)
Sacramento Jackson and Bradshaw Yes 38.530987 -121.338308 Certain cattails (Typha spp.)