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
Stanislaus 26 Mile Road Yes 37.866600 -120.879000 Certain Himalayan blackberry (Rubus armeniacus)
Merced 4th Ave past Rosa Rd. Yes 37.320663 -120.873942 Certain Himalayan blackberry (Rubus armeniacus)
Siskiyou Adams Point., Klamath Co. OR Yes 42.018087 -121.508446 Certain California blackberry (Rubus ursinus)
Solano Admiral Callaghan Lane Yes 38.131800 -122.224100 Certain bulrush or tule (Schoenoplectus spp.) cattails (Typha spp.)
Glenn Afton Yes 39.419000 -121.967000 Uncertain bulrush or tule (Schoenoplectus spp.)
Sacramento Alabama Road Yes 38.284900 -121.209500 Certain other (note in Comments)
Alameda Alameda Creek Yes 37.578600 -121.877800 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Alameda Altamont Creek Yes 37.660042 -121.808553 Certain cattails (Typha spp.)
Alameda Altamont Pass Road Yes 37.744900 -121.642300 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Alameda Ames and Dalton Yes 37.727594 -121.732668 Certain cattails (Typha spp.)
Yolo Anderson Pond Yes 38.610400 -121.996300 Certain cattails (Typha spp.)
Sacramento Angle Road Yes 38.312284 -121.211813 Certain cattails (Typha spp.)
Napa Anselmo Court Marsh Yes 38.246530 -122.280200 Certain cattails (Typha spp.)
San Luis Obispo Antelope Grade Pond Yes 35.741531 -120.234847 Certain cattails (Typha spp.)
Santa Cruz Antonelli Pond Yes 36.957400 -122.059800 Certain cattails (Typha spp.) willows (Salix spp.)
Yuba Arboga Yes 39.051900 -121.555500 Uncertain other (note in Comments)
Shasta Archie Brown Road Yes 41.061400 -121.509300 Certain other (note in Comments) other (note in Comments)
Merced Arena Plains Unit #2-Merced NWR Yes 37.274300 -120.720080 Certain cattails (Typha spp.)
Merced Arena Plains Unit, Merced NWR - Bear Creek Yes 37.254312 -120.714684 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Arkansas Creek Dam: North Yes 38.470020 -121.060000 Certain willows (Salix spp.)
Mendocino Armstrong's Pasture, Potter Valley Yes 39.279590 -123.089662 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Arno Road Dairy Yes 38.339640 -121.290360 Certain willows (Salix spp.) bulrush or tule (Schoenoplectus spp.)
Glenn Artois Yes 39.619600 -122.194200 Uncertain willows (Salix spp.)
Tulare Atwell Island - BLM Yes 35.844597 -119.498929 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Tulare Atwell Island Ton Tache Unit 4 Yes 35.845030 -119.498656 Certain bulrush or tule (Schoenoplectus spp.) cattails (Typha spp.)
Kings Avenal, Highway 33 Yes 35.971963 -120.115156 Certain wheat mustard (Brassica spp.)
Tulare Avenue 120 #1 Yes 35.994320 -119.468510 Certain
Tulare Avenue 120 #2 Yes 36.006620 -119.479950 Certain
Tulare Avenue 120 #3 Yes 35.999450 -119.472440 Certain
Madera Avenue 7 at Road 16 Yes 36.850900 -120.237100 Certain bulrush or tule (Schoenoplectus spp.)
Los Angeles Avenue F Dairy Yes 34.750600 -117.963400 Certain wheat
Napa Aviation Way Pond Yes 38.219462 -122.260398 Certain bulrush or tule (Schoenoplectus spp.) willows (Salix spp.)
Crook Barnes Butte Reservoir Yes 44.335100 -120.821500 Certain cattails (Typha spp.)
San Diego Barrett Junction Yes 32.611544 -116.713514 Certain bulrush or tule (Schoenoplectus spp.)
Shasta Basin Hollow Creek Yes 40.580000 -122.100000 Certain Himalayan blackberry (Rubus armeniacus) bulrush or tule (Schoenoplectus spp.)
Madera Bates Station Road Yes 37.077510 -119.864170 Certain milk thistle (Silybum marianum)
Yuba Beale A.F.B.: Lower Blackwelder Lake Yes 39.132300 -121.383300 Certain Himalayan blackberry (Rubus armeniacus)
Yuba Beale A.F.B.: Miller Lake Yes 39.168400 -121.402100 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Yuba Beale AFB: A St. Waste Water Pond Yes 39.112613 -121.390429 Certain cattails (Typha spp.) Himalayan blackberry (Rubus armeniacus)
Yuba Beale AFB: Patrol Road - Reeds Creek North Yes 39.144238 -121.465187 Certain Himalayan blackberry (Rubus armeniacus)
Yuba Beale Main Gate Yes 39.130070 -121.445400 Certain bulrush or tule (Schoenoplectus spp.)
Kern Bear Mountain Blvd and Adobe Yes 35.214385 -118.965797 Certain triticale mustard (Brassica spp.)
Santa Barbara Bell Road Pond Yes 34.933100 -119.649000 Certain cattails (Typha spp.) wheat
Yuba Best Slough Yes 39.026500 -121.507400 Certain cattails (Typha spp.) Himalayan blackberry (Rubus armeniacus)
Sacramento Bethany Slavic Church Yes 38.525900 -121.331100 Certain Himalayan blackberry (Rubus armeniacus)
Fresno Big Dry Creek Reservoir Yes 36.873100 -119.648000 Certain stinging nettle (Urtica dioica) milk thistle (Silybum marianum)
Shasta Big Lake Yes 41.108000 -121.396000 Certain other (note in Comments)
Butte Biggs Yes 39.412500 -121.713000 Uncertain cattails (Typha spp.)
Kern Bitter Creek N.W.R. - Azbul Trough Yes 34.935631 -119.354643 Certain bull thistle (Cirsium vulgare)
Kern Bitter Creek N.W.R. - Bonnie's Pond Yes 34.935130 -119.415900 Certain bull thistle (Cirsium vulgare)
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