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
Sacramento Haycock Street Yes 38.499600 -121.108800 Certain cattails (Typha spp.) milk thistle (Silybum marianum)
Monterey Hebert Road Pond Yes 36.763200 -121.619400 Certain cattails (Typha spp.)
Sacramento Herald Yes 38.296000 -121.243000 Uncertain cattails (Typha spp.)
Lake Highland Springs Road Yes 38.960787 -122.897242 Certain cattails (Typha spp.)
Humboldt Highway 101 at Drake Hill Road #1 Yes 40.559380 -124.146530 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Highway 104 at Clay Yes 38.340300 -121.155000 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Highway 104 at Clay #2 Yes 38.353700 -121.127000 Certain wild rose
Sacramento Highway 104 at Clay Station Road #1 Yes 38.335490 -121.169170 Certain Himalayan blackberry (Rubus armeniacus)
Sacramento Highway 104 at Clay Station Road #2 Yes 38.337950 -121.163030 Certain Himalayan blackberry (Rubus armeniacus)
Sutter Highway 113 Yes 38.941900 -121.679700 Certain
Sutter Highway 113 #2 Yes 38.929000 -121.684700 Certain
San Joaquin Highway 12 at Highway 88 Yes 38.137100 -121.164900 Certain cattails (Typha spp.)
Merced Highway 165 at 6th Avenue Yes 37.301700 -120.851100 Certain Himalayan blackberry (Rubus armeniacus)
San Benito Highway 25 Yes 36.347300 -120.957500 Certain cattails (Typha spp.) mustard (Brassica spp.)
San Joaquin Highway 26 at Calaveras County Line Yes 38.096570 -120.942590 Certain
Napa Highway 29 Pond Yes 38.204280 -122.257490 Certain cattails (Typha spp.) willows (Salix spp.)
Kern Highway 46 at Corcoran Road Yes 35.604600 -119.571900 Certain tamarisk 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.)
Calaveras Highway 49 near Cosgrave Rd Yes 38.111701 -120.594073 Certain Himalayan blackberry (Rubus armeniacus)
San Luis Obispo Highway 58 Pond Yes 35.367251 -120.077755 Certain cattails (Typha spp.)
San Luis Obispo Highway 58 Pond #2 Yes 35.369490 -120.082905 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Colusa Highway 99 at Maxwell Yes 39.290784 -122.190714 Certain bulrush or tule (Schoenoplectus spp.) willows (Salix spp.)
Sacramento Highway 99 at Twin Cities Road Yes 38.292980 -121.311410 Certain Himalayan blackberry (Rubus armeniacus)
Lassen Honey Lake Wildlife Area - Dakin Unit Yes 40.315800 -120.378700 Certain cattails (Typha spp.)
Lassen Honey Lake Wildlife Area - Fleming Unit Yes 40.354750 -120.297500 Certain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Mendocino Hopper's Corner, Potter Valley Yes 39.325521 -123.095675 Certain Himalayan blackberry (Rubus armeniacus)
Shasta Horr Pond North Yes 41.104030 -121.444800 Certain stinging nettle (Urtica dioica)
Shasta Horr Pond South Yes 41.087100 -121.451900 Certain stinging nettle (Urtica dioica)
Sacramento Horseless Carriage and Bradshaw Yes 38.500363 -121.340840 Certain Himalayan blackberry (Rubus armeniacus)
Napa Huichica Creek at Buchli Station Road Yes 38.213450 -122.330510 Certain cattails (Typha spp.)
Napa Huichica Creek Pond Yes 38.211883 -122.346411 Certain cattails (Typha spp.)
Merced Hulen Levee Yes 37.144200 -120.993700 Certain Himalayan blackberry (Rubus armeniacus) milk thistle (Silybum marianum)
Butte Humboldt Road Dump Yes 39.739510 -121.787267 Certain bull thistle (Cirsium vulgare)
Calaveras Hunt Road #1 Yes 38.047600 -120.828000 Certain Himalayan blackberry (Rubus armeniacus)
Calaveras Hunt Road #2 Yes 38.053500 -120.725000 Certain cattails (Typha spp.)
Calaveras Hunt Road #3 Yes 38.042140 -120.840470 Certain Himalayan blackberry (Rubus armeniacus)
Orange Huntington Central Park Yes 33.699100 -118.010600 Uncertain cattails (Typha spp.) bulrush or tule (Schoenoplectus spp.)
Colusa Husted Road Yes 39.181910 -122.131090 Certain cattails (Typha spp.)
Colusa Husted Road at Highway 20 Yes 39.174000 -122.132000 Certain cattails (Typha spp.)
San Luis Obispo Hwy 33 Cuyama Valley Yes 34.918751 -119.513054 Certain cattails (Typha spp.) willows (Salix spp.)
Calaveras Hwy 49 A Cosgrave Rd #2 Yes 38.109482 -120.599284 Certain Himalayan blackberry (Rubus armeniacus) cattails (Typha spp.)
Tuolumne Hwy 49 near Sims Rd and Rail Xing #1 Yes 37.896302 -120.449775 Certain Himalayan blackberry (Rubus armeniacus)
Tuolumne Hwy 49 nr Sims Rd and RR Xing #2 Yes 37.905810 -120.451114 Certain Himalayan blackberry (Rubus armeniacus)
San Diego Hwy 79 Call Box 79-231 Santa Ynez Valley Yes 33.147400 -116.676000 Certain Himalayan blackberry (Rubus armeniacus) stinging nettle (Urtica dioica)
Yuba Hwy. 20 and Woodruff Lane Yes 39.208442 -121.519623 Certain Himalayan blackberry (Rubus armeniacus)
San Diego Hwy. 79, Warner Springs South Yes 33.252065 -116.671995 Certain bulrush or tule (Schoenoplectus spp.) other (note in Comments)
Tehama I-5 and Draper Rd. (Exit 662) Yes 40.370758 -122.286595 Certain Himalayan blackberry (Rubus armeniacus)
Merced I-5 North ROW Yes 37.184500 -121.067100 Certain milk thistle (Silybum marianum)
Amador Indian Creek Yes 38.483200 -120.922250 Certain Himalayan blackberry (Rubus armeniacus)
Placer Industrial Avenue Yes 38.861280 -121.313280 Certain bulrush or tule (Schoenoplectus spp.) cattails (Typha spp.)
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