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
Fresno Zediker Avenue at Shaw Avenue Yes 36.803220 -119.525300 Certain bulrush or tule (Schoenoplectus spp.)
Placer Markham Ravine 2 Yes 38.889000 -121.441000 Certain Himalayan blackberry (Rubus armeniacus)
Amador De Martini Yes 38.455320 -120.912830 Certain Himalayan blackberry (Rubus armeniacus)
Napa Wilms Ranch Yes 38.663300 -122.477000 Certain bull thistle (Cirsium vulgare)
Kern Kern NWR Fowler Canal Yes 35.775500 -119.611700 Certain bull thistle (Cirsium vulgare)
Stanislaus Sonora Road #3 Yes 37.885800 -120.829600 Certain Himalayan blackberry (Rubus armeniacus)
Los Angeles Avenue F Dairy Yes 34.750600 -117.963400 Certain wheat
Kern KVLI radio tower Yes 35.632500 -118.477220 Certain stinging nettle (Urtica dioica)
Calaveras Tower Ranch Yes 38.047600 -120.833400 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Folsom South Canal at White Rock Road Yes 38.589000 -121.267000 Certain milk thistle (Silybum marianum) bull thistle (Cirsium vulgare)
Kern Robinson Point Yes 35.666927 -118.402534 Certain willows (Salix spp.)
Colusa Maxwell Sites Road Yes 39.291890 -122.309720 Certain other (note in Comments) other (note in Comments)
Stanislaus Christman Levee I Yes 37.619030 -121.181850 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Monterey Old Stage Road Pond #2 Yes 36.660200 -121.548400 Certain bulrush or tule (Schoenoplectus spp.)
Merced Fahey South Yes 37.126654 -120.989477 Certain mallow (Malva sp.)
Stanislaus West Main Street at Crows Landing Road Yes 37.492900 -120.994500 Certain bulrush or tule (Schoenoplectus spp.)
San Diego Warner Springs Hwy 79 and Hwy S2 Yes 33.250675 -116.674204 Certain mustard (Brassica spp.)
Colusa Stonyford Yes 39.376300 -122.554030 Certain bull thistle (Cirsium vulgare)
Merced Merced NWR: West Farmfield Yes 37.177500 -120.634000 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Sacramento Mather and Jackson Yes 38.533680 -121.315455 Certain bulrush or tule (Schoenoplectus spp.) cattails (Typha spp.)
Kern Semitropic Storage Pond Yes 35.722911 -119.389586 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Sacramento Silva Ranch Road Yes 38.476600 -121.155900 Certain Himalayan blackberry (Rubus armeniacus) willows (Salix spp.)
Stanislaus Sonora Road at Frankenheimer Road Yes 37.862815 -120.776203 Certain Himalayan blackberry (Rubus armeniacus) bulrush or tule (Schoenoplectus spp.)
San Diego Oak Grove Yes 33.388600 -116.787600 Certain
Merced West Bear Creek Levee 1 Yes 37.256620 -120.828890 Certain milk thistle (Silybum marianum)
Stanislaus Sonora Road Pond Yes 37.878800 -120.812600 Certain bulrush or tule (Schoenoplectus spp.) milk thistle (Silybum marianum)
Merced Kesterson NWR- Gallo Ponds Yes 37.269900 -120.923600 Certain cattails (Typha spp.)
Sacramento Grant Line N of Douglas Yes 38.570063 -121.185038 Certain cattails (Typha spp.)
Monterey Locke Padden Pond Yes 36.689400 -121.801150 Certain cattails (Typha spp.)
Placer Gladding Hwy. 65 Yes 38.917783 -121.321013 Certain Himalayan blackberry (Rubus armeniacus)
Merced Los Banos Wildlife Area 42 Yes 37.100690 -120.800000 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Solano Creed Road - Denverton Creek Yes 38.242500 -121.888720 Certain Himalayan blackberry (Rubus armeniacus) bulrush or tule (Schoenoplectus spp.)
Crook Elliot Marsh Yes 44.341700 -120.921600 Certain cattails (Typha spp.)
San Luis Obispo Highway 46 at Highway 1 Yes 35.542200 -120.964900 Certain bulrush or tule (Schoenoplectus spp.) mustard (Brassica spp.)
Yuba Hwy. 20 and Woodruff Lane Yes 39.208442 -121.519623 Certain Himalayan blackberry (Rubus armeniacus)
Napa Saint Supéry Vineyards Yes 38.639700 -122.365700 Certain Himalayan blackberry (Rubus armeniacus)
Alameda Sunol #2 Yes 37.568800 -121.873900 Certain cattails (Typha spp.)
El Dorado Wetsel-Oviatt Road Yes 38.603786 -121.052470 Certain willows (Salix spp.) milk thistle (Silybum marianum)
Kern Interstate 5 at Kings County Line Yes 35.786140 -119.780450 Certain cattails (Typha spp.)
Napa Juliana Vineyard Pond #2 Yes 38.655900 -122.396700 Certain cattails (Typha spp.)
Alameda Shadow Cliffs Lake Yes 37.665614 -121.831512 Certain cattails (Typha spp.)
Colusa Four Mile Road Yes 39.382013 -122.113552 Certain other (note in Comments)
Solano Burke Lane Yes 38.309066 -121.845632 Certain bulrush or tule (Schoenoplectus spp.)
Stanislaus Pete Miller 2 Yes 37.254319 -121.102889 Certain bulrush or tule (Schoenoplectus spp.)
Merced Rosa Road Yes 37.309590 -120.860330 Certain Himalayan blackberry (Rubus armeniacus)
San Benito Highway 25 Yes 36.347300 -120.957500 Certain cattails (Typha spp.) mustard (Brassica spp.)
Merced Central American 3 Yes 37.392100 -120.950300 Certain Himalayan blackberry (Rubus armeniacus)
Butte Gridley Road at Pennington Road Yes 39.366400 -121.794200 Certain milk thistle (Silybum marianum)
Sacramento Calvine Road Yes 38.447600 -121.379000 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Bradshaw between Hwy 16 and Elder Cr Rd Yes 38.518028 -121.330583 Certain Himalayan blackberry (Rubus armeniacus) cattails (Typha spp.)
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