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 Diego West San Luis Rey Yes 33.231000 -117.342000 Uncertain bulrush or tule (Schoenoplectus spp.)
Santa Barbara West Santa Barbara Yes 34.441600 -119.817700 Uncertain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Sacramento West Scott Road Yes 38.554000 -121.141000 Uncertain Himalayan blackberry (Rubus armeniacus)
Santa Cruz West Struve Slough Yes 36.916393 -121.779242 Uncertain bulrush or tule (Schoenoplectus spp.)
Stanislaus West Stuhr Road Yes 37.327210 -121.103680 Certain cattails (Typha spp.)
Butte Western Triangle Yes 39.519400 -121.709200 Certain Himalayan blackberry (Rubus armeniacus) cattails (Typha spp.)
Mendocino Westside Road, Potter Valley Yes 39.301908 -123.108485 Certain Himalayan blackberry (Rubus armeniacus)
El Dorado Wetsel-Oviatt Road Yes 38.603786 -121.052470 Certain willows (Salix spp.) milk thistle (Silybum marianum)
San Diego Whelan Lake Yes 33.244400 -117.337700 Certain cattails (Typha spp.)
Sacramento White Road Rd Inaccessible Pond Yes 38.616500 -121.107187 Uncertain bulrush or tule (Schoenoplectus spp.)
Mariposa White Rock Road 13.4 miles from Old Highway Yes 37.306950 -120.112850 Certain milk thistle (Silybum marianum) cattails (Typha spp.)
Mariposa White Rock Road 14.5 miles from Old Highway Yes 37.299020 -120.127520 Certain milk thistle (Silybum marianum) willows (Salix spp.)
Sacramento White Rock Road at Placerville Road Yes 38.575700 -121.298200 Certain cattails (Typha spp.)
Butte Wicks Corner Yes 39.587881 -121.623201 Certain Himalayan blackberry (Rubus armeniacus)
Kern Wildwood Road #2 Yes 35.729069 -119.439124 Certain triticale
Colusa Williams Yes 39.156000 -122.144000 Uncertain cattails (Typha spp.)
Stanislaus Willms Ranch House Yes 37.801590 -120.646480 Certain Himalayan blackberry (Rubus armeniacus) willows (Salix spp.)
Glenn Willows Yes 39.514100 -122.200600 Uncertain cattails (Typha spp.)
Napa Wilms Ranch Yes 38.663300 -122.477000 Certain bull thistle (Cirsium vulgare)
Sacramento Wilton Fire Station Yes 38.400200 -121.256500 Certain Himalayan blackberry (Rubus armeniacus)
Riverside Winchester Slough Yes 33.601931 -117.117391 Certain cattails (Typha spp.)
Kern Wind Wolves: Doggy Flat Yes 34.947100 -119.158900 Certain stinging nettle (Urtica dioica)
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: Upper Echo Yes 34.947973 -119.182434 Certain milk thistle (Silybum marianum) mustard (Brassica spp.)
Kern Wind Wolves: West Gate Yes 34.944300 -119.188000 Certain stinging nettle (Urtica dioica) cattails (Typha spp.)
Contra Costa Windemere Parkway Pond Yes 37.752900 -121.888600 Certain cattails (Typha spp.)
Yolo Winters Sewage East Yes 38.542100 -121.985400 Certain cattails (Typha spp.)
Yolo Woodland Yes 38.677310 -121.765360 Uncertain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Yolo Woodland Sugar Ponds Yes 38.704000 -121.720000 Uncertain milk thistle (Silybum marianum)
Crook Woodward Marsh Yes 44.369800 -120.926200 Certain cattails (Typha spp.)
Placer Yankee Slough Yes 38.969163 -121.340155 Certain Himalayan blackberry (Rubus armeniacus) bulrush or tule (Schoenoplectus spp.)
Yolo Yolo Bypass II Yes 38.427011 -121.609090 Certain mustard (Brassica spp.) milk thistle (Silybum marianum)
Yolo Yolo Bypass Wildlife Area Yes 38.564600 -121.621200 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Yolo Yolo Quarry Yes 38.691910 -121.953880 Certain
Tuolumne Yosemite Junction Yes 37.889423 -120.494640 Certain Himalayan blackberry (Rubus armeniacus)
Merced Yosemite Lake Yes 37.368000 -120.435000 Certain other (note in Comments)
Merced Youd Road Yes 37.445600 -120.532700 Certain Himalayan blackberry (Rubus armeniacus)
Fresno Zediker Avenue Yes 36.794400 -119.518000 Certain milk thistle (Silybum marianum)
Fresno Zediker Avenue at Shaw Avenue Yes 36.803220 -119.525300 Certain bulrush or tule (Schoenoplectus spp.)
Sacramento Zinfandel Drive Yes 38.581600 -121.283900 Certain Himalayan blackberry (Rubus armeniacus)
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