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
San Luis Obispo Chorro Reservoir Yes 35.338989 -120.686300 Certain bulrush or tule (Schoenoplectus spp.)
Stanislaus Christman Levee I Yes 37.619030 -121.181850 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Stanislaus Christman Levee II Yes 37.621790 -121.182590 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Stanislaus Christman Levee III Yes 37.625900 -121.182040 Certain milk thistle (Silybum marianum)
Stanislaus Christman Levee IV Yes 37.626300 -121.182980 Certain mustard (Brassica spp.) milk thistle (Silybum marianum)
Butte Clark Road - Hwy. 191 Yes 39.612960 -121.631012 Uncertain Himalayan blackberry (Rubus armeniacus) cattails (Typha spp.)
Sacramento Clay Yes 38.335900 -121.159800 Uncertain Himalayan blackberry (Rubus armeniacus)
Sacramento Clay Station Rd and Momtoma Ln. Yes 38.405835 -121.173583 Certain cattails (Typha spp.)
Sacramento Clay Station Road Yes 38.354400 -121.174400 Certain cattails (Typha spp.)
Shasta Clover Creek South Yes 40.489057 -122.294203 Certain Himalayan blackberry (Rubus armeniacus) other (note in Comments)
Fresno Coalinga Gravel Pit Yes 36.168500 -120.368600 Certain cattails (Typha spp.)
Monterey Coleman Reservoir Yes 35.971338 -121.170959 Certain cattails (Typha spp.)
Sacramento Colony Road at Walmort Road Yes 38.367500 -121.245790 Certain Himalayan blackberry (Rubus armeniacus) cattails (Typha spp.)
Colusa Colusa Yes 39.207600 -122.010400 Uncertain other (note in Comments)
Colusa Colusa NWR T21 Yes 39.126100 -122.049000 Certain cattails (Typha spp.)
Colusa Colusa NWR T21&22 Yes 39.126200 -122.042000 Certain cattails (Typha spp.)
Colusa Colusa NWR T27 Yes 39.142375 -122.028330 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Yolo Conaway Ranch Yes 38.646600 -121.708800 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Yolo Conaway Ranch #3 Yes 38.604400 -121.711000 Certain Himalayan blackberry (Rubus armeniacus)
Yolo Conaway Ranch Berries Yes 38.646600 -121.689300 Certain Himalayan blackberry (Rubus armeniacus) willows (Salix spp.)
Yolo Conaway Ranch Brood Pond Yes 38.629700 -121.703700 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Yolo Conaway Ranch Reservoir Yes 38.646000 -121.694300 Certain Himalayan blackberry (Rubus armeniacus) cattails (Typha spp.)
Yolo Conaway Ranch Thistles Yes 38.643700 -121.709000 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Sonoma Copeland Creek Yes 38.342800 -122.669000 Certain Himalayan blackberry (Rubus armeniacus) willows (Salix spp.)
Calaveras Copperopolis Pond Yes 37.982800 -120.646900 Certain cattails (Typha spp.)
San Luis Obispo Corbett Canyon Yes 35.197922 -120.602932 Certain bulrush or tule (Schoenoplectus spp.) willows (Salix spp.)
Kern Corcoran Road Yes 35.644700 -119.578300 Certain cattails (Typha spp.)
Butte Cottonwood Creek Yes 39.558093 -121.600370 Certain willows (Salix spp.) Himalayan blackberry (Rubus armeniacus)
El Dorado County Line Yes 38.614372 -121.070551 Certain Himalayan blackberry (Rubus armeniacus) cattails (Typha spp.)
Glenn County Line Norman Road Yes 39.408631 -122.136716 Certain bulrush or tule (Schoenoplectus spp.)
Modoc County Road 187A Yes 41.325731 -120.534267 Certain cattails (Typha spp.)
Yolo County Road 92B Yes 38.764580 -121.924030 Certain Himalayan blackberry (Rubus armeniacus)
Butte Cox Lane West Yes 39.384990 -121.602859 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Coyote Creek at Scott Road Yes 38.559300 -121.127600 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Alameda Coyote Hills Regional Park- Dumbarton Yes 37.542672 -122.086945 Certain bulrush or tule (Schoenoplectus spp.)
Santa Clara Coyote Percolation Ponds Yes 37.245800 -121.870800 Certain bulrush or tule (Schoenoplectus spp.)
Santa Clara Coyote Ranch Park Yes 37.227090 -121.750640 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Yolo CR 102 and Kentucky Ave. Yes 38.691382 -121.727915 Certain stinging nettle (Urtica dioica) mustard (Brassica spp.)
El Dorado Crazy Horse Campground Yes 38.654100 -121.004100 Certain cattails (Typha spp.)
Monterey Crazy Horse Pond Yes 36.774600 -121.602600 Certain cattails (Typha spp.)
Solano Creed Road - Denverton Creek Yes 38.242500 -121.888720 Certain Himalayan blackberry (Rubus armeniacus) bulrush or tule (Schoenoplectus spp.)
Tulare Creighton Ranch Yes 36.069444 -119.452778 Certain other (note in Comments)
Stanislaus Crows Landing Yes 37.393700 -121.072000 Uncertain bulrush or tule (Schoenoplectus spp.) bulrush or tule (Schoenoplectus spp.)
Stanislaus Crows Landing Road at Bradbury Road Yes 37.449000 -121.003000 Uncertain cattails (Typha spp.)
Fresno CSU Fresno Yes 36.817531 -119.743423 Certain other (note in Comments)
San Luis Obispo Cuesta College Yes 35.333500 -120.736900 Certain bulrush or tule (Schoenoplectus spp.)
San Luis Obispo Cuyama Pond Yes 34.928200 -119.519000 Certain bulrush or tule (Schoenoplectus spp.) cattails (Typha spp.)
San Luis Obispo Cuyama River Yes 35.067370 -119.989610 Certain cattails (Typha spp.)
Santa Barbara Cuyama River Bridge Yes 34.933840 -119.598900 Certain other (note in Comments)
Marin Cypress Grove Preserve Yes 38.167381 -122.900335 Certain bulrush or tule (Schoenoplectus spp.)
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