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 Colonysort icon Latitude Longitude Location Confidence Primary Substrate Secondary Substrate
Alameda Broadmoor Pond Yes 37.723190 -121.723400 Certain bull thistle (Cirsium vulgare)
Colusa Delevan T21.2 Yes 39.306700 -122.109200 Certain cattails (Typha spp.)
Colusa Delevan T43 Yes 39.277000 -122.101900 Certain cattails (Typha spp.)
Fresno Little Panoche Reservoir Yes 36.784300 -120.799600 Certain bull thistle (Cirsium vulgare)
Glenn Stony Creek Yes 39.740400 -122.076400 Certain Giant reed (Arundo donax)
Kern Canebreak Ecological Reserve Yes 35.737387 -118.172100 Certain Himalayan blackberry (Rubus armeniacus)
Kern Kern NWR Fowler Canal Yes 35.775500 -119.611700 Certain bull thistle (Cirsium vulgare)
Kern Kern River Bridge/I-5 Yes 35.300600 -119.270200 Certain stinging nettle (Urtica dioica) other (note in Comments)
Kern Kern River Parkway Yes 35.329900 -119.189600 Certain
Kern Lake Isabella Yes 35.665100 -118.347500 Certain cattails (Typha spp.) stinging nettle (Urtica dioica)
Kern Bitter Creek N.W.R. - Spanish Spring Yes 34.959700 -119.362000 Certain stinging nettle (Urtica dioica) willows (Salix spp.)
Kern Kern NWR Unit 1 Yes 35.727100 -119.598200 Certain
Kern Wind Wolves: Echo Canyon Yes 34.954300 -119.139000 Certain stinging nettle (Urtica dioica)
Kern Wind Wolves: Echo Flat Yes 34.957400 -119.132000 Certain willows (Salix spp.) stinging nettle (Urtica dioica)
Kern Wind Wolves: Little Lobo Yes 34.949200 -119.215000 Certain willows (Salix spp.) stinging nettle (Urtica dioica)
Kern Wind Wolves: Muddy Creek Yes 34.943800 -119.188000 Certain willows (Salix spp.) stinging nettle (Urtica dioica)
Kern Wind Wolves: Sag Pond Yes 34.946600 -119.166000 Certain cattails (Typha spp.)
Kern Wind Wolves: Santiago Springs Yes 34.938600 -119.296000 Certain stinging nettle (Urtica dioica) willows (Salix spp.)
Kern Wind Wolves: West Gate Yes 34.944300 -119.188000 Certain stinging nettle (Urtica dioica) cattails (Typha spp.)
Merced Merced NWR: East Farmfield 3 Yes 37.180300 -120.614000 Certain mustard (Brassica spp.) milk thistle (Silybum marianum)
Merced Merced NWR North Yes 37.202600 -120.615300 Certain Himalayan blackberry (Rubus armeniacus)
Merced O'Neill Forebay Yes 37.079300 -121.023000 Certain Himalayan blackberry (Rubus armeniacus)
Merced Merced NWR: West Farmfield Yes 37.177500 -120.634000 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Monterey Laguna Seca Yes 36.571400 -121.768000 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Riverside Perris Airport Yes 33.753300 -117.217200 Certain mustard (Brassica spp.) milk thistle (Silybum marianum)
Riverside San Jacinto WA: Potrero Pond Yes 33.863050 -116.948300 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Sacramento Lopez Ag. Services Yes 38.501100 -121.251800 Certain milk thistle (Silybum marianum)
San Diego Borrego Springs Country Club Yes 33.242900 -116.357000 Certain cattails (Typha spp.)
San Luis Obispo Harmony Headlands Yes 35.473900 -121.002300 Certain cattails (Typha spp.)
Solano Hay Road Landfill Yes 38.306500 -121.825400 Certain cattails (Typha spp.)
Tulare Lake Success Yes 36.101000 -118.911700 Certain stinging nettle (Urtica dioica)
Tulare Pixley Wildlife Refuge Yes 35.902700 -119.371500 Certain milk thistle (Silybum marianum)
Tulare Toledo Pit Yes 36.056300 -119.408700 Certain cattails (Typha spp.)
Yolo Conaway Ranch Yes 38.646600 -121.708800 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Yolo Conaway Ranch Thistles Yes 38.643700 -121.709000 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Yuba Beale A.F.B.: Lower Blackwelder Lake Yes 39.132300 -121.383300 Certain Himalayan blackberry (Rubus armeniacus)
Yuba Beale Main Gate Yes 39.130070 -121.445400 Certain bulrush or tule (Schoenoplectus spp.)
Yuba Beale A.F.B.: Miller Lake Yes 39.168400 -121.402100 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Merced Los Banos Wildlife Area 42 Yes 37.100690 -120.800000 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Merced Volta Lake Marsh Yes 37.100600 -120.939000 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Alameda Stivers Lagoon Yes 37.548933 -121.961900 Certain bulrush or tule (Schoenoplectus spp.)
Alameda Milpitas North Yes 37.497946 -121.924467 Certain bull thistle (Cirsium vulgare) mustard (Brassica spp.)
Alameda Coyote Hills Regional Park- Dumbarton Yes 37.542672 -122.086945 Certain bulrush or tule (Schoenoplectus spp.)
Colusa Ohm Road Yes 39.063720 -122.041900 Certain cattails (Typha spp.)
Alameda Kaiser Gravel Company Yes 37.676484 -121.829538 Certain cattails (Typha spp.)
Butte Humboldt Road Dump Yes 39.739510 -121.787267 Certain bull thistle (Cirsium vulgare)
Colusa East Park Reservoir Yes 39.312485 -122.489705 Certain cattails (Typha spp.)
Merced North Grasslands Wildlife Area - Salt Slough Unit Yes 37.169922 -120.821344 Certain milk thistle (Silybum marianum)
Alameda Warm Springs 1 Yes 37.487050 -121.934981 Certain bull thistle (Cirsium vulgare)
Alameda Warm Springs 2 Yes 37.487918 -121.939852 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
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